echa[7], heca[7], eche[7], hece[7], esce[5],
ach[6], cha[6], che[6], ech[6], hec[6], ehe[5], has[5], hes[5], ces[4],
ha[4], eh[4], he[4], ce[3], ee[2], as[2], es[2], se[2],
