6 letter words:
fesses9,
seises6,
5 letter words:
fesse8,
seifs8,
esses5,
seise5,
sises5,
4 letter words:
fees7,
fess7,
seif7,
eses4,
sees4,
seis4,
3 letter words:
efs6,
fee6,
fes6,
fie6,
ifs6,
ess3,
see3,
sei3,
sis3,
2 letter words:
ef5,
fe5,
if5,
es2,
is2,
si2,