Not much to go on there, but:
_men = count units nameofyourgroup
? _men == 12 : goto "ok"
? _men <12 : hint format ["Group has %1 men", _men]
goto "notok"
#ok
...more stuff
...extra stuff
...anything else
goto "exit"
#notok
...bits
...more bits
...income tax return
#exit
exit
EDIT..........forgot the exit
Planck