4 letter words:
opah9,
phon9,
noah7,
bona6,
3 letter words:
bah8,
boh8,
hap8,
hob8,
hop8,
pah8,
pho8,
poh8,
bap7,
bop7,
han6,
hao6,
hoa6,
hon6,
nah6,
noh6,
abo5,
apo5,
ban5,
boa5,
bon5,
nab5,
nap5,
nob5,
oba5,
pan5,
poa5,
2 letter words:
ah5,
ha5,
ho5,
oh5,
ab4,
ba4,
bo4,
ob4,
op4,
pa4,
po4,
an2,
na2,
no2,
on2,