7 letter words:
fatback18,
5 letter words:
aback13,
abaft10,
4 letter words:
back12,
tack10,
fact9,
kata8,
taka8,
acta6,
3 letter words:
kaf10,
kab9,
fab8,
cab7,
kat7,
aft6,
fat6,
aba5,
act5,
baa5,
bat5,
cat5,
tab5,
2 letter words:
ka6,
fa5,
ab4,
ba4,
aa2,
at2,
ta2,
