----- 2 -----
AA
AD
AE
BA
BE
DA
EA
EE
EF
FA
----- 3 -----
ABA
ABB
ACE
ADD
BAA
BAC
BAD
BED
BEE
CAB
CAD
CEE
DAB
DAD
DAE
DEB
DEE
DEF
EBB
EFF
FAB
FAD
FED
FEE
----- 4 -----
ABAC
ABBA
ABBE
ABED
ACED
BABA
BABE
BADE
BAFF
BEAD
BEDE
BEEF
CABA
CADE
CAFE
CAFF
CECA
CEDE
DACE
DAFF
DEAD
DEAF
DEED
ECAD
FACE
FADE
FAFF
FEED
----- 5 -----
ABACA
ABCEE
ADDED
BAAED
BACCA
BEDAD
CADEE
CAECA
CEDED
DECAD
EBBED
EFFED
FACED
FADED
----- 6 -----
ACCEDE
BACCAE
BAFFED
BEADED
BEDDED
BEEFED
DABBED
DADDED
DAFFED
DEADED
DECADE
DECAFF
DEEDED
DEFACE
EFFACE
FACADE
FAFFED
----- 7 -----
ACCEDED
DEFACED
EFFACED