5 letter words:
booky14,
looby10,
4 letter words:
kybo13,
yolk11,
boko10,
book10,
kobo10,
boyo9,
kolo8,
look8,
bolo6,
bool6,
lobo6,
obol6,
3 letter words:
yok10,
bok9,
kob9,
boy8,
yob8,
loy6,
boo5,
lob5,
obo5,
loo3,
2 letter words:
ky9,
by7,
ko6,
oy5,
yo5,
bo4,
ob4,
lo2,
oo2,