6 letter words:
berret8,
better8,
terret6,
tetter6,
5 letter words:
beret7,
breer7,
brere7,
4 letter words:
beer6,
beet6,
bere6,
bete6,
bree6,
brer6,
rete4,
teer4,
tete4,
tree4,
tret4,
3 letter words:
bee5,
bet5,
brr5,
reb5,
ere3,
err3,
ree3,
ret3,
tee3,
tet3,
2 letter words:
be4,
ee2,
er2,
et2,
re2,
te2,