Plan 9 from Bell Labs’s /sys/src/games/sapper
d-rwxrwxr-x sys sys 0 May 13 2020 eb --rw-rw-r-- sys sys 101 Aug 12 1994 mkfile --rw-rw-r-- sys sys 12568 Aug 12 1994 sapper.c --rw-rw-r-- sys sys 1521 Aug 12 1994 sapper.man
