moo.6

unix v7是最后一个广泛发布的研究型UNIX版本

.TH MOO 6 
.SH NAME
moo \- guessing game
.SH SYNOPSIS
.B /usr/games/moo
.SH DESCRIPTION
.I Moo
is a guessing game imported from England.
The computer picks a number consisting
of four distinct decimal digits.
The player guesses four distinct digits
being scored on each guess.
A `cow' is a correct digit in an incorrect position.
A `bull' is a correct digit in a correct position.
The game continues until the player guesses the number
(a score of four bulls).