5 letter words:
bergs8,
4 letter words:
begs7,
berg7,
best6,
bets6,
rebs6,
ergs5,
gest5,
gets5,
regs5,
tegs5,
erst4,
rest4,
rets4,
tres4,
3 letter words:
beg6,
bes5,
bet5,
reb5,
erg4,
get4,
reg4,
seg4,
teg4,
ers3,
res3,
ret3,
ser3,
set3,
2 letter words:
be4,
er2,
es2,
et2,
re2,