5 letter words:
yolky15,
4 letter words:
kybo13,
roky11,
yolk11,
york11,
bork10,
byrl9,
orby9,
lory7,
3 letter words:
yok10,
bok9,
kob9,
boy8,
yob8,
kor7,
rok7,
loy6,
bor5,
bro5,
lob5,
orb5,
rob5,
lor3,
2 letter words:
ky9,
by7,
ko6,
oy5,
yo5,
bo4,
ob4,
lo2,
or2,