5 letter words:
kufis12,
bisks11,
busks11,
4 letter words:
kifs11,
kufi11,
bisk10,
busk10,
fibs9,
fubs9,
kiss8,
skis8,
suks8,
fuss7,
buss6,
sibs6,
subs6,
3 letter words:
kif10,
fib8,
fub8,
kis7,
ski7,
suk7,
ifs6,
bis5,
bus5,
sib5,
sub5,
sis3,
2 letter words:
ki6,
if5,
bi4,
is2,
si2,
us2,