efeb[10], bece[7], eche[7], hece[7], chen[7],
fee[7], fen[7], nef[7], che[6], ech[6], hec[6], bee[5], ehe[5], ben[5], hen[5], cen[4], cne[4],
ef[6], fe[6], be[4], eh[4], he[4], ce[3], ee[2], en[2],
