sad
s-a-d
red
r-e-d
bod
b-o-d
lad
l-a-d
bed
b-e-d
dud
d-u-d
tub
t-u-b
bud
b-u-d
led
l-e-d
kid
k-i-d
cod
c-o-d
rob
r-o-b
bid
b-i-d
bad
b-a-d