4 letter words:
figo8,
goaf8,
biga7,
biog7,
obia6,
agio5,
3 letter words:
fab8,
fib8,
fob8,
fag7,
fig7,
fog7,
gif7,
bag6,
big6,
bog6,
gab6,
gib6,
gob6,
oaf6,
abo5,
bio5,
boa5,
boi5,
oba5,
obi5,
ago4,
gio4,
goa4,
2 letter words:
fa5,
if5,
of5,
ab4,
ba4,
bi4,
bo4,
ob4,
ag3,
gi3,
go3,
ai2,
io2,
oi2,