diff --git a/rust/day7/input b/rust/day7/input
index e69de29..9bade1b 100644
--- a/rust/day7/input
+++ b/rust/day7/input
@@ -0,0 +1,1015 @@
+$ cd /
+$ ls
+dir dpllhlcv
+284723 hznrlfhh.tnz
+dir mgjdlmrz
+dir njstc
+dir nzwbc
+dir qzzfvdh
+dir smvhphf
+$ cd dpllhlcv
+$ ls
+11223 bplz.rdp
+dir gpmlznd
+dir pgcctrb
+dir wmsl
+$ cd gpmlznd
+$ ls
+dir lwzcss
+83678 nzwbc.rgv
+dir rhdllvm
+94635 wpglzlrf.htl
+$ cd lwzcss
+$ ls
+dir bttplh
+$ cd bttplh
+$ ls
+dir rzj
+$ cd rzj
+$ ls
+59866 nzwbc.psj
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd rhdllvm
+$ ls
+dir mvqfrq
+$ cd mvqfrq
+$ ls
+41266 prvl
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd pgcctrb
+$ ls
+dir dgpfcftj
+$ cd dgpfcftj
+$ ls
+101757 tzjthwc
+$ cd ..
+$ cd ..
+$ cd wmsl
+$ ls
+215238 bvlvn.pgf
+dir hhtztpm
+197563 hznrlfhh.tnz
+dir tzjthwc
+$ cd hhtztpm
+$ ls
+196378 djfbm.djl
+203856 ltnwbvg.rqz
+266242 mjrlm
+dir ngjd
+dir wmsl
+$ cd ngjd
+$ ls
+289546 mjrlm
+$ cd ..
+$ cd wmsl
+$ ls
+153439 qqb.qmd
+25326 tzjthwc
+$ cd ..
+$ cd ..
+$ cd tzjthwc
+$ ls
+dir lhccf
+235335 nzwbc
+dir wgnhhl
+dir wmsl
+$ cd lhccf
+$ ls
+dir nzwbc
+100347 rrrj.wzl
+dir zfwffjn
+$ cd nzwbc
+$ ls
+dir wmsl
+$ cd wmsl
+$ ls
+102053 nzwbc.qbd
+$ cd ..
+$ cd ..
+$ cd zfwffjn
+$ ls
+dir mrd
+23992 rrrj.jcz
+dir vnwpddtf
+$ cd mrd
+$ ls
+139407 qqwlrbsw.zfn
+$ cd ..
+$ cd vnwpddtf
+$ ls
+287771 dgpfcftj.wpm
+59212 qqb.qmd
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd wgnhhl
+$ ls
+120460 rrrj
+$ cd ..
+$ cd wmsl
+$ ls
+17612 rlsswjw.wbr
+132954 ttbswbhs.ffs
+dir zpldfrj
+$ cd zpldfrj
+$ ls
+180679 qljrrlm.clw
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd mgjdlmrz
+$ ls
+79173 dng.qrc
+dir fnfw
+dir hwb
+dir nfqzjs
+dir qdgplmrt
+dir znrnj
+$ cd fnfw
+$ ls
+dir bhjm
+263282 bplz.rdp
+dir dhsvtfc
+dir hlh
+dir nzwbc
+177780 ttbswbhs.ffs
+28452 tzjthwc.wlq
+19548 wmsl.rmd
+$ cd bhjm
+$ ls
+dir bpl
+57561 dgpfcftj
+dir glplnd
+170692 hwsjhwvf.rmv
+dir rrrj
+dir tlltjd
+dir tzjthwc
+dir wmsl
+$ cd bpl
+$ ls
+dir btpglc
+275227 fmbpzn
+9798 mjztf.nlg
+190388 nzwbc
+dir tzjthwc
+$ cd btpglc
+$ ls
+276105 rrrj.rhl
+$ cd ..
+$ cd tzjthwc
+$ ls
+dir hqmw
+280196 hznrlfhh.tnz
+51545 mjrlm
+228230 wmsl
+$ cd hqmw
+$ ls
+163168 mchnt.pls
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd glplnd
+$ ls
+147261 bplz.rdp
+267191 hznrlfhh.tnz
+$ cd ..
+$ cd rrrj
+$ ls
+dir dgpfcftj
+dir fwdw
+277548 hnz
+164103 nvcsdq.tpj
+265477 qzwsg.ccl
+dir tnpjsgnq
+dir tpvttzv
+209300 wmsl.wtq
+$ cd dgpfcftj
+$ ls
+dir dqtbltwp
+$ cd dqtbltwp
+$ ls
+27856 tzjthwc.gnr
+$ cd ..
+$ cd ..
+$ cd fwdw
+$ ls
+166347 fgtfj.pnc
+140486 mspn.wcw
+26602 nzwbc.dhb
+81490 qqb.qmd
+$ cd ..
+$ cd tnpjsgnq
+$ ls
+dir gbddb
+dir gpqssnq
+$ cd gbddb
+$ ls
+1587 qqb.qmd
+$ cd ..
+$ cd gpqssnq
+$ ls
+33979 fmjpw.mtp
+$ cd ..
+$ cd ..
+$ cd tpvttzv
+$ ls
+dir bqvzmb
+$ cd bqvzmb
+$ ls
+79211 fdhjztlv
+72991 wgvqvdp.pzp
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd tlltjd
+$ ls
+58096 swqcsnw
+$ cd ..
+$ cd tzjthwc
+$ ls
+66628 pzrdpc.fpc
+$ cd ..
+$ cd wmsl
+$ ls
+43111 hznrlfhh.tnz
+114356 rrrj.rlf
+169873 zpwhgzvc.wql
+$ cd ..
+$ cd ..
+$ cd dhsvtfc
+$ ls
+dir cwbq
+201361 dgpfcftj
+291508 jjjjwcw
+445 pfdvf.pmj
+135732 qpc.gsw
+115597 wlgrtn.mjb
+dir wmsl
+$ cd cwbq
+$ ls
+dir ccgdn
+dir gcfbqh
+173860 hznrlfhh.tnz
+97790 mjrlm
+dir qtfhz
+dir tpgj
+dir tph
+$ cd ccgdn
+$ ls
+dir blnzrjm
+46502 fgmntg.crb
+dir fwdpw
+dir nbldsrfq
+11175 nwj.fht
+208129 qqb.qmd
+dir wpj
+$ cd blnzrjm
+$ ls
+121398 gvs
+201215 pdppzscr.vph
+dir pwj
+3861 smwrnw.hqp
+dir tzjthwc
+220659 wzccnw.lsc
+$ cd pwj
+$ ls
+279141 bwj.ntc
+15325 jvqwhwmh.brq
+$ cd ..
+$ cd tzjthwc
+$ ls
+25191 jdgphj
+70354 rrrj.szq
+256692 wmsl
+$ cd ..
+$ cd ..
+$ cd fwdpw
+$ ls
+28780 prhjf
+$ cd ..
+$ cd nbldsrfq
+$ ls
+57352 dcrhr
+$ cd ..
+$ cd wpj
+$ ls
+51243 jmdn.bzh
+$ cd ..
+$ cd ..
+$ cd gcfbqh
+$ ls
+92250 crmpsc.rbf
+284234 tzjthwc
+$ cd ..
+$ cd qtfhz
+$ ls
+164311 hznrlfhh.tnz
+137031 mjrlm
+$ cd ..
+$ cd tpgj
+$ ls
+210570 jdpv.fpw
+$ cd ..
+$ cd tph
+$ ls
+dir hptp
+dir rrrj
+$ cd hptp
+$ ls
+272964 qqb.qmd
+147435 svrcpb
+$ cd ..
+$ cd rrrj
+$ ls
+145269 btzl.vcs
+156500 tzjthwc.ddw
+236073 vsrghnhl.wdc
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd wmsl
+$ ls
+62697 mjrlm
+dir psndpb
+33688 tzjthwc.hjc
+100902 tzjthwc.rnm
+$ cd psndpb
+$ ls
+dir dbm
+dir fbmfpndf
+dir fstgbcrc
+272771 lszgqt
+136189 mjrlm
+166606 qqb.qmd
+dir vptjzdt
+$ cd dbm
+$ ls
+dir nzwbc
+dir tzjthwc
+$ cd nzwbc
+$ ls
+dir ffmrngmj
+$ cd ffmrngmj
+$ ls
+299742 nrwrptz.cmp
+$ cd ..
+$ cd ..
+$ cd tzjthwc
+$ ls
+268152 pln
+$ cd ..
+$ cd ..
+$ cd fbmfpndf
+$ ls
+186758 bplz.rdp
+$ cd ..
+$ cd fstgbcrc
+$ ls
+4975 hznrlfhh.tnz
+59093 mjrlm
+dir nzwbc
+279246 qqb.qmd
+$ cd nzwbc
+$ ls
+152443 nzwbc
+$ cd ..
+$ cd ..
+$ cd vptjzdt
+$ ls
+117403 ttbswbhs.ffs
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd hlh
+$ ls
+96676 rrrj.mfv
+$ cd ..
+$ cd nzwbc
+$ ls
+192533 njwsbs.srq
+$ cd ..
+$ cd ..
+$ cd hwb
+$ ls
+44576 dshmsgj.cnd
+70710 tdcgvdv.phs
+$ cd ..
+$ cd nfqzjs
+$ ls
+18103 tfwmgdj
+$ cd ..
+$ cd qdgplmrt
+$ ls
+163549 mjrlm
+$ cd ..
+$ cd znrnj
+$ ls
+dir dgpfcftj
+53146 mzbpjgd.lmp
+202250 vmtdc
+$ cd dgpfcftj
+$ ls
+dir cdgrjlz
+238240 fmtclb.vfq
+$ cd cdgrjlz
+$ ls
+89863 dpnzsq.dbd
+259686 mjrlm
+50165 qqb.qmd
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd njstc
+$ ls
+70592 bplz.rdp
+100122 ccdp.lpw
+dir jnffc
+dir jnrrwt
+21922 lcr.mqp
+dir mdts
+9581 rwdnfc.zqq
+dir zchc
+$ cd jnffc
+$ ls
+54279 vbvpzw.rst
+147514 vzshqq.qpb
+$ cd ..
+$ cd jnrrwt
+$ ls
+51615 bplz.rdp
+dir fvmgmn
+dir wjrqnlr
+$ cd fvmgmn
+$ ls
+159538 sntlcs.vms
+$ cd ..
+$ cd wjrqnlr
+$ ls
+dir dvcqnv
+dir jnjzlhhw
+135325 mjrlm
+94135 qqb.qmd
+$ cd dvcqnv
+$ ls
+66408 mjrlm
+$ cd ..
+$ cd jnjzlhhw
+$ ls
+89668 bplz.rdp
+dir btcjthr
+$ cd btcjthr
+$ ls
+dir sbcwwvj
+dir tzjthwc
+280405 zjf.fqt
+$ cd sbcwwvj
+$ ls
+dir wmsl
+$ cd wmsl
+$ ls
+31258 vfwqsw
+$ cd ..
+$ cd ..
+$ cd tzjthwc
+$ ls
+dir dgpfcftj
+$ cd dgpfcftj
+$ ls
+281485 lhnnjrcq
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd mdts
+$ ls
+191614 ttbswbhs.ffs
+$ cd ..
+$ cd zchc
+$ ls
+dir rrrj
+$ cd rrrj
+$ ls
+102230 ttbswbhs.ffs
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd nzwbc
+$ ls
+30185 bplz.rdp
+dir dgpfcftj
+238614 hfg.tsw
+215453 lzvmwg.crp
+dir mfbhtb
+dir nbdn
+dir nzw
+77355 qqb.qmd
+114201 wmsl
+dir zcv
+$ cd dgpfcftj
+$ ls
+258786 dhdmsqfs.jhs
+dir ltrg
+dir nzwbc
+18568 qqb.qmd
+$ cd ltrg
+$ ls
+dir nzwbc
+dir wmsl
+$ cd nzwbc
+$ ls
+72334 fhd
+$ cd ..
+$ cd wmsl
+$ ls
+dir rvt
+$ cd rvt
+$ ls
+232235 nzwbc
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd nzwbc
+$ ls
+29531 rnl
+$ cd ..
+$ cd ..
+$ cd mfbhtb
+$ ls
+21538 sjrwtjcq
+$ cd ..
+$ cd nbdn
+$ ls
+120432 bplz.rdp
+180737 hjsv
+295982 mjrlm
+dir rscwnwt
+13218 vzjtg.hhp
+1332 zjwf.spw
+$ cd rscwnwt
+$ ls
+268727 fnvfrbzg.wmw
+155540 jgfvpmp
+242598 rrrj
+47339 vqqqmg.dss
+$ cd ..
+$ cd ..
+$ cd nzw
+$ ls
+135129 hfbptj.rsq
+dir nhzg
+dir qshfn
+$ cd nhzg
+$ ls
+219375 tzjthwc.gsl
+$ cd ..
+$ cd qshfn
+$ ls
+dir pnjhczqg
+dir tzjthwc
+279385 whsdfns
+141044 wmsl.tpl
+$ cd pnjhczqg
+$ ls
+141321 rlgtn.jvh
+dir wrh
+$ cd wrh
+$ ls
+143304 sfvrld.nsz
+$ cd ..
+$ cd ..
+$ cd tzjthwc
+$ ls
+dir lnhmfb
+168870 qqb.qmd
+178464 rrrj.qml
+201521 rwdwv.gnn
+21171 vznflldw.zrf
+$ cd lnhmfb
+$ ls
+dir dzzdvmtl
+dir ttnm
+$ cd dzzdvmtl
+$ ls
+dir mrg
+$ cd mrg
+$ ls
+174378 rrrj.lnh
+$ cd ..
+$ cd ..
+$ cd ttnm
+$ ls
+272667 hznrlfhh.tnz
+251551 wmsl.ggr
+97289 wmsl.phl
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd zcv
+$ ls
+dir cwsqwt
+dir dgpfcftj
+256838 dntqvr.snf
+dir nbq
+dir nzbdsvt
+293181 rrrj.lvd
+$ cd cwsqwt
+$ ls
+141770 bbrgtfh.zmf
+100359 mjrlm
+96547 qqb.qmd
+176620 ttbswbhs.ffs
+$ cd ..
+$ cd dgpfcftj
+$ ls
+82245 pqjjnjrw
+295247 rrrj.lfw
+$ cd ..
+$ cd nbq
+$ ls
+132140 bwdvjv.gwq
+dir gbjtzhj
+dir mfsr
+dir nzwbc
+248867 rrrj
+226784 sjtsjgrb
+94475 tjh.vft
+dir tzjthwc
+149501 tzjthwc.rgb
+$ cd gbjtzhj
+$ ls
+43689 rrrj.msh
+$ cd ..
+$ cd mfsr
+$ ls
+30068 sntz.lqw
+dir tch
+dir zzgtsqvh
+$ cd tch
+$ ls
+dir tzjthwc
+$ cd tzjthwc
+$ ls
+289238 sjwjdmd
+$ cd ..
+$ cd ..
+$ cd zzgtsqvh
+$ ls
+289069 tzjthwc.mql
+$ cd ..
+$ cd ..
+$ cd nzwbc
+$ ls
+138407 hgtr.hst
+$ cd ..
+$ cd tzjthwc
+$ ls
+173287 tclm.zqt
+$ cd ..
+$ cd ..
+$ cd nzbdsvt
+$ ls
+89301 ttbswbhs.ffs
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd qzzfvdh
+$ ls
+102585 dgpfcftj.fbr
+dir nzwbc
+dir rrrj
+dir tzjthwc
+dir vgnlftjr
+dir vjqzf
+dir zhmgmmv
+$ cd nzwbc
+$ ls
+252665 ffq.sjv
+87232 hznrlfhh.tnz
+dir lfpltbmd
+dir lmnvgrm
+223794 mjrlm
+dir qnfp
+dir wdn
+$ cd lfpltbmd
+$ ls
+dir dgpfcftj
+59516 frtspbh
+$ cd dgpfcftj
+$ ls
+264780 bplz.rdp
+169819 nmwvbqlr.dpd
+9212 whtcbl.zzb
+$ cd ..
+$ cd ..
+$ cd lmnvgrm
+$ ls
+12367 nwc.qbd
+dir rrrj
+dir wmsl
+$ cd rrrj
+$ ls
+269510 tctgzc
+$ cd ..
+$ cd wmsl
+$ ls
+138765 bdgpp.fwd
+298221 fljmgctv
+90883 hwmwtln
+2731 jnhrtbqs
+$ cd ..
+$ cd ..
+$ cd qnfp
+$ ls
+78470 ddbcjwg.wqc
+dir ldq
+dir ljv
+dir nzwbc
+254734 qrwct.rvp
+dir wmsl
+95613 wmsl.wgv
+$ cd ldq
+$ ls
+268677 ttbswbhs.ffs
+dir wmsl
+$ cd wmsl
+$ ls
+dir wfqbv
+$ cd wfqbv
+$ ls
+268503 tgrlfscv.vbn
+222733 vwlcnm.wqq
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ljv
+$ ls
+184758 gjddvvbs.zjq
+278919 mjrlm
+241428 nzwbc.fsf
+dir wdfwp
+$ cd wdfwp
+$ ls
+100960 jnhpmp
+204739 sfhjbnq.jpr
+110857 twrzzn.tpm
+$ cd ..
+$ cd ..
+$ cd nzwbc
+$ ls
+171647 glrd
+$ cd ..
+$ cd wmsl
+$ ls
+39475 frptpcd.cbf
+dir mnd
+258387 tzjthwc
+$ cd mnd
+$ ls
+dir wmsl
+$ cd wmsl
+$ ls
+dir rrrj
+$ cd rrrj
+$ ls
+124041 rmrqhf
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd wdn
+$ ls
+220196 gpp.qdd
+71184 jsjcvvmd.mdc
+228140 rrrj.cqm
+$ cd ..
+$ cd ..
+$ cd rrrj
+$ ls
+165549 qgd.pgt
+206913 rrrj.whw
+56087 ttbswbhs.ffs
+$ cd ..
+$ cd tzjthwc
+$ ls
+dir cjrtl
+dir cmqzqrc
+dir dgpfcftj
+dir gmlgztg
+16349 hgjnnw.nwp
+dir qflmtrgh
+dir snjv
+118210 ttbswbhs.ffs
+dir vsq
+211036 zsflzpg
+$ cd cjrtl
+$ ls
+157605 frfb.flq
+182254 gqtprzlg
+dir lldcwcf
+86395 ttbswbhs.ffs
+dir wmsl
+$ cd lldcwcf
+$ ls
+279487 bplz.rdp
+229071 djzs
+$ cd ..
+$ cd wmsl
+$ ls
+dir dnfztwvj
+$ cd dnfztwvj
+$ ls
+211224 hznrlfhh.tnz
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd cmqzqrc
+$ ls
+dir bsfqcv
+dir dgpfcftj
+dir nzwbc
+$ cd bsfqcv
+$ ls
+62520 ltzblpc
+$ cd ..
+$ cd dgpfcftj
+$ ls
+144915 bdv.snn
+170427 rrrj.qfg
+287416 tzjthwc
+$ cd ..
+$ cd nzwbc
+$ ls
+223973 zvssq.lch
+$ cd ..
+$ cd ..
+$ cd dgpfcftj
+$ ls
+dir pzfnlzbj
+$ cd pzfnlzbj
+$ ls
+190720 dgpfcftj.ffm
+$ cd ..
+$ cd ..
+$ cd gmlgztg
+$ ls
+234781 bplz.rdp
+29314 nzwbc.mgl
+86928 qqb.qmd
+262374 rrrj.qlm
+$ cd ..
+$ cd qflmtrgh
+$ ls
+dir rrrj
+dir wrm
+$ cd rrrj
+$ ls
+dir wftzbw
+$ cd wftzbw
+$ ls
+dir chzs
+$ cd chzs
+$ ls
+dir dfhzcft
+$ cd dfhzcft
+$ ls
+93504 mjrlm
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd wrm
+$ ls
+13708 jzgqvthh
+138652 mlwflb
+145161 szfzs.clj
+297793 ttbswbhs.ffs
+$ cd ..
+$ cd ..
+$ cd snjv
+$ ls
+dir grq
+92025 nzwbc
+dir rrrj
+dir wmsl
+$ cd grq
+$ ls
+189188 jzccjh.lsl
+dir nzwbc
+97611 pngngj
+dir tzjthwc
+dir wjcjqc
+$ cd nzwbc
+$ ls
+12818 vzc
+$ cd ..
+$ cd tzjthwc
+$ ls
+dir cfwvmwr
+54762 dgpfcftj
+179432 gbt.whg
+dir njsfv
+220002 whr.jqn
+$ cd cfwvmwr
+$ ls
+227691 pfgmbsjd
+$ cd ..
+$ cd njsfv
+$ ls
+39114 fpjqqcsp.czm
+289813 mjrlm
+279549 qqb.qmd
+$ cd ..
+$ cd ..
+$ cd wjcjqc
+$ ls
+258155 ttbswbhs.ffs
+$ cd ..
+$ cd ..
+$ cd rrrj
+$ ls
+277036 bdgws
+dir dgpfcftj
+269322 dgpfcftj.zgt
+dir fsqdnl
+33872 qqb.qmd
+$ cd dgpfcftj
+$ ls
+172038 mzjmmddr.fnl
+$ cd ..
+$ cd fsqdnl
+$ ls
+250732 zczcgq.lbb
+$ cd ..
+$ cd ..
+$ cd wmsl
+$ ls
+84076 nzwbc.pmp
+196119 rrrj.gph
+104986 ttbswbhs.ffs
+dir zmvrrdps
+$ cd zmvrrdps
+$ ls
+170723 wmsl.mpg
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd vsq
+$ ls
+136431 hznrlfhh.tnz
+195767 mrrc.tst
+$ cd ..
+$ cd ..
+$ cd vgnlftjr
+$ ls
+29769 mjrlm
+53024 wmsl.nhr
+123863 wps.hhq
+$ cd ..
+$ cd vjqzf
+$ ls
+dir dgpfcftj
+dir gnnstzc
+45701 lgrst.fhc
+265249 spdrmtbd.pnd
+182349 ttbswbhs.ffs
+$ cd dgpfcftj
+$ ls
+47874 mvlb.gbn
+$ cd ..
+$ cd gnnstzc
+$ ls
+105525 lbqh.pst
+13456 rrrj.hlm
+62170 vll.cft
+$ cd ..
+$ cd ..
+$ cd zhmgmmv
+$ ls
+dir fvwm
+165656 qtjnmzrd.grm
+$ cd fvwm
+$ ls
+dir dgpfcftj
+$ cd dgpfcftj
+$ ls
+214069 qqb.qmd
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd smvhphf
+$ ls
+202817 dvtblw.wsr
\ No newline at end of file
diff --git a/rust/day7/src/main.rs b/rust/day7/src/main.rs
index 9d3940a..7982e71 100644
--- a/rust/day7/src/main.rs
+++ b/rust/day7/src/main.rs
@@ -1,27 +1,28 @@
 use std::fs::read_to_string;
 mod system;
+use system::Disk;
 
-fn decode(cmd: Vec<&str>) -> system::Disk {
-    let mut index = 1;  // ignoring the first cd /
-    let mut disk = system::Disk::new();
+fn decode(cmd: Vec<&str>) -> Disk {
+    let mut index = 1; // ignoring the first cd /
+    let mut disk = Disk::new();
     while index < cmd.len() {
-        if cmd[index].contains("ls") {
-            index +=1;
-            while (index < cmd.len()) && !(cmd[index].contains("ls") || cmd[index].contains("cd")) {
-                let info : Vec<&str> = cmd[index].split(' ').collect();
+        let mut info: Vec<&str> = cmd[index].split(' ').collect();
+        if info[1] == "ls" {
+            index += 1;
+            while (index < cmd.len()) && (!(cmd[index].as_bytes()[0] == ('$' as u8))) {
+                info = cmd[index].split(' ').collect();
                 match info[0] {
                     "dir" => disk.create_directory(info[1]),
-                    &_ => disk.create_file(info[0].parse::<u64>().unwrap(),info[1])
+                    &_ => disk.create_file(info[0].parse::<u64>().unwrap(), info[1]),
                 }
-                index +=1;
+                index += 1;
             }
-        } else if cmd[index].contains("cd") {
-            let info : Vec<&str> = cmd[index].split(' ').collect();
+        } else if info[1] == "cd" {
             match info[2] {
                 ".." => disk.goto_parent(),
-                &_ => disk.change_directory(info[2]) 
+                &_ => disk.change_directory(info[2]),
             }
-            index +=1;
+            index += 1;
         } else {
             index += 1;
         }
@@ -29,8 +30,26 @@ fn decode(cmd: Vec<&str>) -> system::Disk {
     disk
 }
 
+fn list_dirs(disk: &Disk, max: u64) -> u64 {
+    let mut sum = 0;
+    for iter in disk
+        .get_directories()
+        .iter()
+        .filter(|dir| disk.get_size(dir) <= max)
+    {
+        println!(
+            "dir: {} with size: {}",
+            disk.get_path(iter),
+            disk.get_size(iter)
+        );
+        sum += disk.get_size(iter);
+    }
+    sum
+}
+
 fn main() {
-    let file_content = read_to_string("exemple").unwrap();
+    let file_content = read_to_string("input").unwrap();
     let final_disk = decode(file_content.split("\n").collect());
     final_disk.print();
+    println!("Total sum: {}", list_dirs(&final_disk, 100000));
 }
diff --git a/rust/day7/src/system.rs b/rust/day7/src/system.rs
index c04ecdf..26b2772 100644
--- a/rust/day7/src/system.rs
+++ b/rust/day7/src/system.rs
@@ -1,10 +1,10 @@
-#[derive(Debug)]
+#[derive(Clone)]
 pub struct File {
     size: u64,
     name: String,
 }
 
-#[derive(Debug)]
+#[derive(Clone)]
 pub struct Directory {
     name: String,
     index: usize,
@@ -14,6 +14,7 @@ pub struct Directory {
     sublevel: u64,
 }
 
+#[derive(Clone)]
 pub struct Disk {
     dir_list: Vec<Directory>,
     selected_dir: usize,
@@ -37,6 +38,10 @@ impl Directory {
             name: name.to_string(),
         });
     }
+
+    pub fn get_name(&self) -> &str {
+        &self.name
+    }
 }
 
 impl Disk {
@@ -65,18 +70,23 @@ impl Disk {
     }
 
     pub fn change_directory(&mut self, name: &str) {
-        let found_index: usize;
-        match self.dir_list.iter_mut().find(|dir| dir.name == name) {
-            None => {
-                println!("There is no such folder '{}' in the disk.", name);
-                return;
-            }
-            Some(found_dir) => found_index = found_dir.index,
+        let mut found_indexes: Vec<usize> = Vec::new();
+        let found: Vec<&mut Directory> = self
+            .dir_list
+            .iter_mut()
+            .filter(|dir| dir.name == name)
+            .collect();
+        if found.is_empty() {
+            println!("There is no such folder '{}' in the disk.", name);
+            return;
+        }
+        for dir in found.iter() {
+            found_indexes.push(dir.index)
         }
         match self.dir_list[self.selected_dir]
             .child
             .iter()
-            .find(|&&index| index == found_index)
+            .find(|&index| found_indexes.contains(index))
         {
             None => println!(
                 "There is no such folder '{}' in the directory '{}'",
@@ -108,4 +118,34 @@ impl Disk {
             println!("{}\tFile: {}, size: {}", space, f.name, f.size);
         }
     }
+
+    pub fn get_path(&self, dir: &Directory) -> String {
+        let mut path = dir.name.to_string()+"/";
+        let mut index = dir.parent;
+        while index != 0 {
+            path += &(self.dir_list[index].name);
+            path += "/";
+            index = self.dir_list[index].parent;
+        }
+        path.chars().rev().collect()
+    }
+
+    pub fn get_directories(&self) -> Vec<&Directory> {
+        let mut dirvec: Vec<&Directory> = Vec::new();
+        for dir in self.dir_list.iter() {
+            dirvec.push(dir);
+        }
+        dirvec
+    }
+
+    pub fn get_size(&self, dir: &Directory) -> u64 {
+        let mut size = 0;
+        for f in &dir.files {
+            size += f.size;
+        }
+        for index in &dir.child {
+            size += self.get_size(&self.dir_list[*index]);
+        }
+        size
+    }
 }