6 letter words:
rebecs10,
creese8,
5 letter words:
rebec9,
beers7,
brees7,
ceres7,
scree7,
resee5,
serer5,
4 letter words:
beer6,
bees6,
bree6,
cees6,
cere6,
rebs6,
recs6,
errs4,
rees4,
seer4,
sere4,
3 letter words:
bee5,
bes5,
brr5,
cee5,
reb5,
rec5,
sec5,
ere3,
err3,
ers3,
ree3,
res3,
see3,
ser3,
2 letter words:
be4,
er2,
es2,
re2,