4 letter words:
kybo13,
towy10,
toby9,
bito6,
obit6,
3 letter words:
kow10,
wok10,
yok10,
bok9,
kob9,
yow9,
bow8,
boy8,
yob8,
kit7,
koi7,
oik7,
owt6,
tow6,
toy6,
two6,
wit6,
wot6,
bio5,
bit5,
boi5,
bot5,
obi5,
2 letter words:
ky9,
by7,
ki6,
ko6,
ow5,
oy5,
wo5,
yo5,
bi4,
bo4,
ob4,
io2,
it2,
oi2,
ti2,
to2,