6 letter words:
biffos14,
buffos14,
5 letter words:
biffo13,
biffs13,
boffs13,
buffi13,
buffo13,
buffs13,
bufos10,
4 letter words:
biff12,
boff12,
buff12,
offs10,
bufo9,
fibs9,
fobs9,
fubs9,
fous7,
ufos7,
bios6,
bois6,
obis6,
3 letter words:
iff9,
off9,
fib8,
fob8,
fub8,
fou6,
ifs6,
sif6,
ufo6,
bio5,
bis5,
boi5,
bos5,
bus5,
obi5,
obs5,
sib5,
sob5,
sub5,
ios3,
iso3,
ous3,
sou3,
sui3,
2 letter words:
if5,
of5,
bi4,
bo4,
ob4,
io2,
is2,
oi2,
os2,
ou2,
si2,
so2,
us2,