~/.cache % ls pip
http selfcheck wheels
~/.cache % ls pip/http
0 1 2 3 4 5 6 7 8 9 a b c d e f
~/.cache % ls pip/http/0
3 4 7 a b e
~/.cache % ls pip/http/0/3
1
~/.cache % ls pip/http/0/3/h
ls: cannot access 'pip/http/0/3/h': No such file or directory
~/.cache % ls pip/http/0/3/1
5
~/.cache % ls pip/http/0/3/1/5
7
~/.cache % ls pip/http/0/3/1/5/7
0315762642f58779e2cecff67579c340ec81a8c2fc3ee7cac703de66