4 letter words:
bard7,
baud7,
brad7,
buda7,
burd7,
darb7,
daub7,
drab7,
drub7,
baur6,
bura6,
daur5,
duar5,
dura5,
3 letter words:
adz13,
bad6,
bud6,
dab6,
dub6,
arb5,
bar5,
bra5,
bru5,
bur5,
rub5,
urb5,
ard4,
rad4,
rud4,
urd4,
2 letter words:
za11,
ab4,
ba4,
ad3,
da3,
ar2,
ur2,