4 letter words:
abac8,
caba8,
acta6,
atoc6,
boat6,
bota6,
coat6,
octa6,
taco6,
3 letter words:
bac7,
cab7,
cob7,
aba5,
abo5,
act5,
baa5,
bat5,
boa5,
bot5,
caa5,
cat5,
cot5,
oba5,
oca5,
tab5,
toc5,
oat3,
tao3,
2 letter words:
ab4,
ba4,
bo4,
ob4,
aa2,
at2,
ta2,
to2,