4 letter words:
forb9,
herb9,
fore7,
froe7,
hero7,
hoer7,
hore7,
orfe7,
bore6,
robe6,
3 letter words:
feh9,
foh9,
boh8,
fob8,
hob8,
erf6,
fer6,
foe6,
for6,
fro6,
her6,
hoe6,
orf6,
ref6,
reh6,
rho6,
bor5,
bro5,
obe5,
orb5,
reb5,
rob5,
ore3,
reo3,
roe3,
2 letter words:
ef5,
eh5,
fe5,
he5,
ho5,
of5,
oh5,
be4,
bo4,
ob4,
er2,
oe2,
or2,
re2,