5 letter words:
fleer8,
refel8,
rebel7,
4 letter words:
beef9,
feeb9,
feel7,
feer7,
fere7,
flee7,
free7,
reef7,
beer6,
bere6,
blee6,
bree6,
leer4,
lere4,
reel4,
3 letter words:
elf6,
erf6,
fee6,
fer6,
ref6,
bee5,
bel5,
reb5,
eel3,
ere3,
lee3,
ree3,
2 letter words:
ef5,
fe5,
be4,
ee2,
el2,
er2,
re2,