diff --git a/day7.c3 b/day7.c3
new file mode 100644
index 0000000..1718b84
--- /dev/null
+++ b/day7.c3
@@ -0,0 +1,121 @@
+module day7;
+import std::array::list;
+import std::io;
+
+define DirList = List<Directory*>;
+
+struct Directory
+{
+	char[] name;
+	DirList other_dirs;
+	Directory* parent_dir;
+	long own_files_size;
+}
+
+fn long Directory.total_size(Directory* this)
+{
+	long total = this.own_files_size;
+	foreach (Directory* dir : this.other_dirs) total += dir.total_size();
+	return total;
+}
+
+fn Directory *handle_command(char[] command, Directory* top, Directory* current_dir)
+{
+	if (command[2..] == "ls") return current_dir;
+	assert(command[2..3] == "cd");
+	char[] dir_name = command[5..];
+	switch DIR: (dir_name)
+	{
+		case "/":
+			return top;
+		case "..":
+			assert(current_dir.parent_dir);
+			return current_dir.parent_dir;
+		default:
+			foreach (Directory* dir : current_dir.other_dirs)
+			{
+				if (dir.name == dir_name)
+				{
+					return dir;
+				}
+			}
+			unreachable("Unknown dir");
+	}
+}
+
+fn void parse_dir(Directory *top)
+{
+	File f;
+	f.open("dir.txt", "rb")!!;
+	defer catch(f.close());
+	Directory* current_dir;
+	while TOP: (!f.eof())
+	{
+		char[] line = f.tgetline();
+		if (!line.len) break;
+		if (line[0] == '$')
+		{
+			current_dir = handle_command(line, top, current_dir);
+			continue;
+		}
+		if (line[0..2] == "dir")
+		{
+			Directory *new_dir = talloc(Directory);
+			*new_dir = { .name = line[4..], .parent_dir = current_dir };
+			current_dir.other_dirs.append(new_dir);
+			continue;
+		}
+		char[][] split = str::tsplit(line, " ");
+		assert(split.len == 2);
+		current_dir.own_files_size += str::to_long(split[0])!!;
+	}
+}
+
+fn long count_dir_1(Directory *dir)
+{
+	long total = 0;
+	foreach (Directory* child : dir.other_dirs)
+	{
+		total += count_dir_1(child);
+	}
+	long this_total = dir.total_size();
+	if (this_total < 100000) total += this_total;
+	return total;
+}
+fn void part1(Directory* top)
+{
+	io::printfln("Total size of small dirs: %d", count_dir_1(top));
+}
+
+fn bool part2_find(Directory* dir, long *smallest_found, long needed)
+{
+	long dir_size = dir.total_size();
+	if (dir_size < needed) return false;
+	bool found_child = false;
+	foreach (Directory* child : dir.other_dirs)
+	{
+		if (part2_find(child, smallest_found, needed)) found_child = true;
+	}
+	if (found_child) return true;
+	if (dir_size >= *smallest_found) return false;
+	*smallest_found = dir_size;
+	return true;
+}
+
+fn void part2(Directory* top)
+{
+	long used = top.total_size();
+	long free = 70_000_000 - used;
+	long need_to_free = 30_000_000 - free;
+	assert(need_to_free > 0);
+	long smallest_found = used + 1;
+	part2_find(top, &smallest_found, need_to_free);
+	io::printfln("Smallest dir size to remove: %s", smallest_found);
+}
+fn void main()
+{
+	Directory top = { .name = "/" };
+	parse_dir(&top);
+	part1(&top);
+	part2(&top);
+}
\ No newline at end of file
diff --git a/dir.txt b/dir.txt
new file mode 100644
index 0000000..4398569
--- /dev/null
+++ b/dir.txt
@@ -0,0 +1,1008 @@
+$ cd /
+$ ls
+dir cdnhnmcb
+dir dmccnsqv
+290229 dsm
+dir gsszlj
+dir hmw
+dir jhmrn
+dir ncb
+dir npclt
+dir rvvjbz
+$ cd cdnhnmcb
+$ ls
+170937 fsjwz.css
+281758 jmfcfs.gsq
+109017 jwwv.zlz
+295735 tsrqvpbq
+$ cd ..
+$ cd dmccnsqv
+$ ls
+273438 fsjwz.css
+dir jtntzqfd
+dir tqmbq
+211769 vmgpwrbz.nbp
+205895 wqz.qcg
+$ cd jtntzqfd
+$ ls
+4635 wqfvvzth.vdz
+$ cd ..
+$ cd tqmbq
+$ ls
+dir bnvspstf
+22264 bqcvlnw.pmq
+dir hwv
+200690 jlwjsbw.bzf
+dir npclt
+243708 qvnbwvt.sbv
+157861 tsrqvpbq.mtf
+$ cd bnvspstf
+$ ls
+46133 mwvz.vwh
+289236 rjcp.gqj
+$ cd ..
+$ cd hwv
+$ ls
+dir tsrqvpbq
+$ cd tsrqvpbq
+$ ls
+292872 rvvjbz.mgh
+$ cd ..
+$ cd ..
+$ cd npclt
+$ ls
+191646 bhllwpr
+26548 jlwjsbw.bzf
+214302 nnqz
+74637 szdjtbt.tmw
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd gsszlj
+$ ls
+dir bjvqcfwc
+dir dfzhdhs
+179837 dsm.hzf
+112354 gnrzhsw.jcf
+175236 jlwjsbw.bzf
+dir mfnllhfw
+dir nwvcgb
+dir rvvjbz
+dir vcvmq
+$ cd bjvqcfwc
+$ ls
+125387 rvvjbz
+$ cd ..
+$ cd dfzhdhs
+$ ls
+218291 jlwjsbw.bzf
+dir jsmjbfg
+dir rvvjbz
+272548 zdrtjvzj.rlt
+196309 ztdcrnl.hjj
+$ cd jsmjbfg
+$ ls
+72259 bmszdt
+242641 fsjwz.css
+109294 mwtlz
+149525 sgngzrnn.mww
+$ cd ..
+$ cd rvvjbz
+$ ls
+175613 rqjmjhrb
+$ cd ..
+$ cd ..
+$ cd mfnllhfw
+$ ls
+119986 fcjrv.dvh
+dir gwjgjljj
+157962 jjjbv.fdp
+dir mwttp
+30246 vhzdjv.fqh
+197554 zdrtjvzj.rlt
+288875 zhdn.dtj
+$ cd gwjgjljj
+$ ls
+237890 mlmmfh
+dir ncjzqll
+10935 zdrtjvzj.rlt
+$ cd ncjzqll
+$ ls
+152092 gwwh.ttt
+$ cd ..
+$ cd ..
+$ cd mwttp
+$ ls
+217929 fsjwz.css
+$ cd ..
+$ cd ..
+$ cd nwvcgb
+$ ls
+131410 fsjwz.css
+dir nqrdmvjm
+82487 qwbg.hcb
+dir tsrqvpbq
+123617 tsrqvpbq.wqw
+$ cd nqrdmvjm
+$ ls
+dir btjwzz
+dir dsm
+dir fcrsj
+141465 fsjwz.css
+133916 ztdcrnl.hjj
+$ cd btjwzz
+$ ls
+dir nqrdmvjm
+dir tsrqvpbq
+150003 zdrtjvzj.rlt
+$ cd nqrdmvjm
+$ ls
+dir dsm
+160109 gzv.wzw
+33187 mcgmjn.ftg
+dir pbgdcwd
+167821 ztdcrnl.hjj
+$ cd dsm
+$ ls
+84979 gwwh.ttt
+dir rvvjbz
+$ cd rvvjbz
+$ ls
+189309 btvjmhp.dwm
+$ cd ..
+$ cd ..
+$ cd pbgdcwd
+$ ls
+240743 rzgbfcg.dzg
+$ cd ..
+$ cd ..
+$ cd tsrqvpbq
+$ ls
+284223 mmhvjn
+188341 tnv.rcs
+271396 zdrtjvzj.rlt
+$ cd ..
+$ cd ..
+$ cd dsm
+$ ls
+128966 ptf
+$ cd ..
+$ cd fcrsj
+$ ls
+261786 qljq.nrv
+$ cd ..
+$ cd ..
+$ cd tsrqvpbq
+$ ls
+57089 fsjwz.css
+208087 ttfhpzll
+$ cd ..
+$ cd ..
+$ cd rvvjbz
+$ ls
+dir ldglv
+$ cd ldglv
+$ ls
+39389 wjwzdg.ldb
+$ cd ..
+$ cd ..
+$ cd vcvmq
+$ ls
+dir jzgd
+246541 lmfdrnnz.dcc
+169613 npclt
+264902 npclt.jsl
+dir pwzbvvwz
+82651 rch.bsc
+223282 vddwtwz.pqf
+dir wnb
+$ cd jzgd
+$ ls
+91717 dqmhdw.mjr
+69771 ztdcrnl.hjj
+$ cd ..
+$ cd pwzbvvwz
+$ ls
+dir cdmfv
+dir fvqjbd
+dir nhvhhs
+dir npclt
+dir rgdb
+$ cd cdmfv
+$ ls
+172054 dsm.qjw
+$ cd ..
+$ cd fvqjbd
+$ ls
+212067 hclqv
+dir tcjsbn
+$ cd tcjsbn
+$ ls
+40576 wbzwnc.pqf
+13447 wlrjhcf.jtg
+$ cd ..
+$ cd ..
+$ cd nhvhhs
+$ ls
+92810 bgfgrzs
+$ cd ..
+$ cd npclt
+$ ls
+dir dcs
+dir tsrqvpbq
+$ cd dcs
+$ ls
+274856 nrqwg
+$ cd ..
+$ cd tsrqvpbq
+$ ls
+144678 jlwjsbw.bzf
+dir nqrdmvjm
+163728 qwddbflc.gjp
+$ cd nqrdmvjm
+$ ls
+122069 btpm.vhg
+105752 psrmw
+149744 rvvjbz.bnn
+126434 ztdcrnl.hjj
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd rgdb
+$ ls
+75645 blzt
+dir clz
+dir ddmbzz
+dir hrl
+280472 jgmd.htc
+217770 nqwgl.qqb
+dir qjcrf
+$ cd clz
+$ ls
+dir fshcptjq
+125496 lhgsdhl.gss
+291857 pfbjptg.lqh
+78923 rdhmmqml.lrw
+$ cd fshcptjq
+$ ls
+157704 btf
+66314 qcpjsfr
+225592 rsftvgr
+$ cd ..
+$ cd ..
+$ cd ddmbzz
+$ ls
+217731 cbc.dmn
+16389 cdwwz
+256395 gwwh.ttt
+233481 rvsslvbh
+dir rvvjbz
+dir zgc
+$ cd rvvjbz
+$ ls
+dir zrwtdlzz
+$ cd zrwtdlzz
+$ ls
+21488 gdgl.vbc
+$ cd ..
+$ cd ..
+$ cd zgc
+$ ls
+222107 gwwh.ttt
+35382 npclt.fpp
+$ cd ..
+$ cd ..
+$ cd hrl
+$ ls
+dir rvvjbz
+$ cd rvvjbz
+$ ls
+65335 dgn.mgd
+$ cd ..
+$ cd ..
+$ cd qjcrf
+$ ls
+dir fjrdgbwh
+$ cd fjrdgbwh
+$ ls
+143960 wvnzt.wvq
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd wnb
+$ ls
+66543 jlwjsbw.bzf
+dir nqrdmvjm
+dir pfwptjtl
+3047 sbdlzbt.hlj
+$ cd nqrdmvjm
+$ ls
+dir cqn
+dir mnmbmb
+182573 pmw.pdl
+dir rvvjbz
+92911 ztdcrnl.hjj
+$ cd cqn
+$ ls
+38563 npclt.pcl
+14353 sdlmtzzv
+52230 ztdcrnl.hjj
+$ cd ..
+$ cd mnmbmb
+$ ls
+212337 fsjwz.css
+24700 gwwh.ttt
+10243 npclt
+dir nqrdmvjm
+238617 rvvjbz
+$ cd nqrdmvjm
+$ ls
+19026 plrvst.bpd
+$ cd ..
+$ cd ..
+$ cd rvvjbz
+$ ls
+23115 fsjwz.css
+260656 jlwjsbw.bzf
+113097 zdrtjvzj.rlt
+$ cd ..
+$ cd ..
+$ cd pfwptjtl
+$ ls
+134817 jlwjsbw.bzf
+80522 npclt
+254529 nqrdmvjm.mbc
+35322 ztdcrnl.hjj
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd hmw
+$ ls
+dir cfc
+dir cmbtwjqm
+dir dsm
+81077 dzsj.bsl
+dir gzgr
+dir jrdhssrz
+dir npclt
+dir tsrqvpbq
+dir vssgzdw
+dir wngccwdr
+5928 wrpd.zwq
+113540 ztdcrnl.hjj
+$ cd cfc
+$ ls
+159334 npclt
+212665 ztdcrnl.hjj
+$ cd ..
+$ cd cmbtwjqm
+$ ls
+dir vzftvhhc
+$ cd vzftvhhc
+$ ls
+86763 jlwjsbw.bzf
+dir nbj
+dir qzbf
+$ cd nbj
+$ ls
+63776 jlwjsbw.bzf
+$ cd ..
+$ cd qzbf
+$ ls
+189850 rtszjp.zhq
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd dsm
+$ ls
+dir bddwfjhv
+258304 fltv
+4285 jlwjsbw.bzf
+dir nqrdmvjm
+dir rvvjbz
+258902 zdrtjvzj.rlt
+$ cd bddwfjhv
+$ ls
+201408 zdrtjvzj.rlt
+$ cd ..
+$ cd nqrdmvjm
+$ ls
+250981 npclt.dnd
+$ cd ..
+$ cd rvvjbz
+$ ls
+181444 npclt.msj
+146533 thzv.jbn
+$ cd ..
+$ cd ..
+$ cd gzgr
+$ ls
+dir brmzzz
+dir dsm
+$ cd brmzzz
+$ ls
+40671 jlwjsbw.bzf
+$ cd ..
+$ cd dsm
+$ ls
+53299 bmdpw
+dir npclt
+223542 qdrlng
+dir thjnrtq
+$ cd npclt
+$ ls
+30938 bdldl
+36847 gfwbhj.nvh
+159051 qjpggrst.czp
+233569 vwpr.drg
+dir wwln
+$ cd wwln
+$ ls
+153489 fsjwz.css
+196950 lzcrjs
+$ cd ..
+$ cd ..
+$ cd thjnrtq
+$ ls
+30861 fsjwz.css
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd jrdhssrz
+$ ls
+194556 bqcn.ctq
+dir gnhc
+148157 gwwh.ttt
+dir jcqcjbj
+245407 jlwjsbw.bzf
+248457 lmvh
+$ cd gnhc
+$ ls
+183841 fsjwz.css
+128648 hzcpmz
+154895 mvznln
+193794 ztdcrnl.hjj
+$ cd ..
+$ cd jcqcjbj
+$ ls
+266176 cbbfjsp
+dir dsm
+195555 sfq
+$ cd dsm
+$ ls
+13098 bjhsqfpp.rvw
+dir grpp
+dir nqb
+$ cd grpp
+$ ls
+259797 jvw.psl
+32317 sfm.twr
+$ cd ..
+$ cd nqb
+$ ls
+82426 rvvjbz.fdm
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd npclt
+$ ls
+dir tqzmprzr
+$ cd tqzmprzr
+$ ls
+278120 dsm.hqd
+$ cd ..
+$ cd ..
+$ cd tsrqvpbq
+$ ls
+dir dqbnbl
+dir dsm
+dir lsglr
+213028 rvvjbz.rvh
+112991 tsrqvpbq.ptw
+$ cd dqbnbl
+$ ls
+dir dhzs
+281375 dsm
+121452 gwwh.ttt
+dir mbc
+dir npclt
+211213 tsrqvpbq.zsz
+125518 zdrtjvzj.rlt
+$ cd dhzs
+$ ls
+110840 gwwh.ttt
+197645 tsrqvpbq
+$ cd ..
+$ cd mbc
+$ ls
+224503 drsrlls.ctp
+dir dzm
+65461 jlwjsbw.bzf
+dir nqrdmvjm
+137158 nqrdmvjm.vtq
+dir rvvjbz
+126868 rwrzljq
+$ cd dzm
+$ ls
+279593 fsjwz.css
+13111 gwwh.ttt
+205453 hchlb.bdn
+277556 jlwjsbw.bzf
+dir jvd
+dir nqrdmvjm
+dir prqlqh
+dir rhdhhfs
+dir rvvjbz
+$ cd jvd
+$ ls
+76776 fsjwz.css
+85847 wqdzvs.vwf
+$ cd ..
+$ cd nqrdmvjm
+$ ls
+40200 npclt.fcq
+$ cd ..
+$ cd prqlqh
+$ ls
+267371 fsjwz.css
+$ cd ..
+$ cd rhdhhfs
+$ ls
+51224 dsm.qln
+$ cd ..
+$ cd rvvjbz
+$ ls
+dir npclt
+dir wdhgmfb
+60599 wjwgrq
+$ cd npclt
+$ ls
+138588 bdqtq.slq
+221322 rjmbd.pdj
+279540 ztdcrnl.hjj
+$ cd ..
+$ cd wdhgmfb
+$ ls
+98271 jcg.pwz
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd nqrdmvjm
+$ ls
+221950 swnsstls.zcl
+7947 tqwhs
+$ cd ..
+$ cd rvvjbz
+$ ls
+272797 zdrtjvzj.rlt
+$ cd ..
+$ cd ..
+$ cd npclt
+$ ls
+294537 bqlgnwwf.qqf
+285887 flzmnmft
+3041 fsjwz.css
+dir npclt
+dir rvvjbz
+235966 zhwvl
+$ cd npclt
+$ ls
+96669 sjcr.qmc
+$ cd ..
+$ cd rvvjbz
+$ ls
+240351 fsjwz.css
+112539 rvvjbz.tlc
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd dsm
+$ ls
+dir dpbsq
+dir lmvjnd
+dir vjnb
+$ cd dpbsq
+$ ls
+dir vczm
+$ cd vczm
+$ ls
+252709 jfzq.fvc
+$ cd ..
+$ cd ..
+$ cd lmvjnd
+$ ls
+20118 rsp.njm
+$ cd ..
+$ cd vjnb
+$ ls
+192558 vvggw.ljj
+$ cd ..
+$ cd ..
+$ cd lsglr
+$ ls
+222728 qvp
+296718 ztdcrnl.hjj
+$ cd ..
+$ cd ..
+$ cd vssgzdw
+$ ls
+dir smfhgcv
+$ cd smfhgcv
+$ ls
+16174 dtpgsvfv.csm
+43403 lhbqdpv
+dir ndh
+52985 pcj.csh
+81157 vwsrt
+278111 zdrtjvzj.rlt
+$ cd ndh
+$ ls
+80287 jlwjsbw.bzf
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd wngccwdr
+$ ls
+6088 ppjnslg
+$ cd ..
+$ cd ..
+$ cd jhmrn
+$ ls
+dir qwqhhbth
+$ cd qwqhhbth
+$ ls
+dir ggfmlp
+dir qgflbldg
+$ cd ggfmlp
+$ ls
+35739 dsm
+38351 jlwjsbw.bzf
+$ cd ..
+$ cd qgflbldg
+$ ls
+dir pbw
+dir rvvjbz
+dir tqppnqmv
+$ cd pbw
+$ ls
+dir nqrdmvjm
+5912 nqrdmvjm.qvj
+$ cd nqrdmvjm
+$ ls
+dir tnd
+$ cd tnd
+$ ls
+dir lwsvwsl
+$ cd lwsvwsl
+$ ls
+150503 jlwjsbw.bzf
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd rvvjbz
+$ ls
+dir dmrff
+dir ssnbl
+dir zgrgt
+$ cd dmrff
+$ ls
+dir vmmzmf
+$ cd vmmzmf
+$ ls
+211105 tsrqvpbq
+$ cd ..
+$ cd ..
+$ cd ssnbl
+$ ls
+246210 mlj.qbv
+$ cd ..
+$ cd zgrgt
+$ ls
+207409 lnvqlhsj
+$ cd ..
+$ cd ..
+$ cd tqppnqmv
+$ ls
+59007 gwwh.ttt
+123705 jlwjsbw.bzf
+277423 rvvjbz.hbn
+170157 tbs
+dir ztg
+$ cd ztg
+$ ls
+8432 fsjwz.css
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ncb
+$ ls
+30859 dsm
+74337 jvp.jwl
+dir lgvwz
+150310 lhl.rtq
+$ cd lgvwz
+$ ls
+105307 fftbgl.tnh
+69432 npclt.sdq
+49765 zdrtjvzj.rlt
+214149 ztdcrnl.hjj
+$ cd ..
+$ cd ..
+$ cd npclt
+$ ls
+dir dsm
+dir rvvjbz
+dir trr
+$ cd dsm
+$ ls
+dir bcccgpl
+dir cvddqch
+210401 fsjwz.css
+96482 nqrdmvjm.tgr
+dir nwctzch
+29453 zdrtjvzj.rlt
+$ cd bcccgpl
+$ ls
+237918 dshtjdcs
+dir mtrcfbf
+dir tgt
+dir tsrqvpbq
+99779 wpfsbnh.nbh
+257112 ztdcrnl.hjj
+$ cd mtrcfbf
+$ ls
+dir hms
+49756 tsrqvpbq
+$ cd hms
+$ ls
+185755 zdrtjvzj.rlt
+$ cd ..
+$ cd ..
+$ cd tgt
+$ ls
+dir dsm
+dir jmfdpdf
+256858 zdrtjvzj.rlt
+$ cd dsm
+$ ls
+71528 dsm.rvc
+$ cd ..
+$ cd jmfdpdf
+$ ls
+231263 hgsvvrqt.vbp
+$ cd ..
+$ cd ..
+$ cd tsrqvpbq
+$ ls
+218774 clhqvp
+$ cd ..
+$ cd ..
+$ cd cvddqch
+$ ls
+144164 fsjwz.css
+dir gfszp
+60880 nqrdmvjm
+222198 vhhtgj
+$ cd gfszp
+$ ls
+127091 fsjwz.css
+$ cd ..
+$ cd ..
+$ cd nwctzch
+$ ls
+258292 rfvvc
+$ cd ..
+$ cd ..
+$ cd rvvjbz
+$ ls
+dir cnv
+dir dtpswgq
+dir ggdhw
+97538 jsjlq
+218535 nqrdmvjm.fhj
+134022 tsrqvpbq.mbs
+51273 zdrtjvzj.rlt
+$ cd cnv
+$ ls
+208016 gzvmv.dfg
+$ cd ..
+$ cd dtpswgq
+$ ls
+dir jfbgfts
+$ cd jfbgfts
+$ ls
+273657 bbtbqv
+77349 dsm.rnc
+dir nqrdmvjm
+208448 zdrtjvzj.rlt
+$ cd nqrdmvjm
+$ ls
+dir bjdrqnt
+dir msqc
+dir npclt
+dir rsms
+dir vzhdtv
+$ cd bjdrqnt
+$ ls
+103077 tph.bpz
+264222 wmvzc
+$ cd ..
+$ cd msqc
+$ ls
+72288 ztdcrnl.hjj
+$ cd ..
+$ cd npclt
+$ ls
+dir tfbzdm
+$ cd tfbzdm
+$ ls
+dir nqrdmvjm
+35970 nqrdmvjm.gwj
+54275 rvvjbz.pvs
+dir wwrsrmn
+179618 ztdcrnl.hjj
+$ cd nqrdmvjm
+$ ls
+dir gljgj
+$ cd gljgj
+$ ls
+135000 gwwh.ttt
+$ cd ..
+$ cd ..
+$ cd wwrsrmn
+$ ls
+17120 npclt.vhz
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd rsms
+$ ls
+198169 fsjwz.css
+$ cd ..
+$ cd vzhdtv
+$ ls
+234619 gwwh.ttt
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ggdhw
+$ ls
+dir dsm
+dir fmljfpfb
+dir nqrdmvjm
+dir qrhnjrn
+dir vpsqmmp
+$ cd dsm
+$ ls
+185390 rvvjbz.ljl
+70843 scrzhct.shj
+dir zqd
+$ cd zqd
+$ ls
+197478 lrpnc.pqp
+dir nljssvvw
+228126 rfsnv
+dir wzvvggdp
+$ cd nljssvvw
+$ ls
+248489 dwdcnzb.ztq
+$ cd ..
+$ cd wzvvggdp
+$ ls
+40266 jlwjsbw.bzf
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd fmljfpfb
+$ ls
+dir chc
+232964 gwwh.ttt
+283351 jlwjsbw.bzf
+$ cd chc
+$ ls
+273399 cjtznvrq.jcd
+250531 dsm.djs
+dir lgqz
+173885 pmlw.hcb
+273356 swwzbpdm
+7329 wtvs.qrr
+$ cd lgqz
+$ ls
+9432 fst.nlb
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd nqrdmvjm
+$ ls
+129926 zdrtjvzj.rlt
+$ cd ..
+$ cd qrhnjrn
+$ ls
+dir vnvchpr
+dir zchcq
+271220 ztdcrnl.hjj
+$ cd vnvchpr
+$ ls
+257931 rvvjbz
+132252 wtgs.btb
+$ cd ..
+$ cd zchcq
+$ ls
+dir hmf
+215104 sshml
+$ cd hmf
+$ ls
+253334 gbvbmwbf.lhs
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd vpsqmmp
+$ ls
+32455 gwwh.ttt
+170338 rfsvs.dfq
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd trr
+$ ls
+dir bfjwfd
+dir bhrvh
+dir ggfc
+187910 gwwh.ttt
+dir mtqftj
+$ cd bfjwfd
+$ ls
+dir npclt
+dir wqqfszn
+$ cd npclt
+$ ls
+269520 trrcw.jmq
+$ cd ..
+$ cd wqqfszn
+$ ls
+151594 rvvjbz.gvt
+$ cd ..
+$ cd ..
+$ cd bhrvh
+$ ls
+251782 cpbvqrjj
+$ cd ..
+$ cd ggfc
+$ ls
+65357 gwwh.ttt
+dir jqjtwf
+$ cd jqjtwf
+$ ls
+65025 wzrp.pbp
+$ cd ..
+$ cd ..
+$ cd mtqftj
+$ ls
+294942 vtjhwjr.qgc
+88168 wvbnjp.blf
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd rvvjbz
+$ ls
+dir csfp
+141875 dsm
+294580 jlwjsbw.bzf
+dir jqlm
+25928 lqhpn.jrh
+224295 zdrtjvzj.rlt
+113314 zww.ftt
+$ cd csfp
+$ ls
+153717 ztdcrnl.hjj
+$ cd ..
+$ cd jqlm
+$ ls
+163455 jlwjsbw.bzf
\ No newline at end of file