6 letter words:
crumbs12,
5 letter words:
crumb11,
curbs9,
scrub9,
scrum9,
4 letter words:
bums8,
cubs8,
curb8,
scum8,
burs6,
crus6,
curs6,
rubs6,
rums6,
urbs6,
3 letter words:
bum7,
cub7,
cum7,
bur5,
bus5,
cru5,
cur5,
mus5,
rub5,
rum5,
sub5,
sum5,
urb5,
2 letter words:
mu4,
um4,
us2,
