5 letter words:
frows11,
riffs11,
woofs11,
roofs8,
4 letter words:
frow10,
offs10,
riff10,
woof10,
firs7,
rifs7,
roof7,
rows7,
woos7,
sori4,
3 letter words:
iff9,
off9,
fir6,
for6,
fro6,
ifs6,
rif6,
row6,
sow6,
wis6,
woo6,
wos6,
ors3,
sir3,
sri3,
2 letter words:
if5,
of5,
ow5,
wo5,
is2,
oi2,
or2,
os2,
si2,
so2,