4 letter words:
barf9,
frag8,
frig8,
brag7,
brig7,
fair7,
fiar7,
garb7,
grab7,
abri6,
ragi5,
3 letter words:
fab8,
fib8,
fag7,
fig7,
arf6,
bag6,
big6,
far6,
fir6,
gab6,
gib6,
rif6,
arb5,
bar5,
bra5,
rib5,
gar4,
rag4,
rig4,
air3,
rai3,
ria3,
2 letter words:
fa5,
if5,
ab4,
ba4,
bi4,
ag3,
ai2,
ar2,