abfeg[11], abgeb[10], begab[10], begeb[10],
abbe[8], bebe[8], ebbe[8], fege[8], gabe[7], gebe[7], abee[6],
beb[7], ebb[7], feg[7], fee[6], gab[6], beg[6], geb[6],
fa[5], ab[4],
