fach[11], bach[9], bace[7], echa[7], heca[7],
haf[9], caf[8], efa[7], cab[6], ach[6], cha[6], che[6], ech[6], hec[6],
fa[6], ef[6], fe[6], ba[4], be[4], ha[4], eh[4], he[4], ce[3],
