4 letter words:
zoos13,
zoot13,
oast4,
oats4,
oots4,
soot4,
stoa4,
taos4,
tosa4,
3 letter words:
azo12,
saz12,
zas12,
zoa12,
zoo12,
zos12,
oat3,
oos3,
oot3,
sat3,
sot3,
tao3,
tas3,
too3,
2 letter words:
za11,
zo11,
as2,
at2,
oo2,
os2,
so2,
st2,
ta2,
to2,