echem[9],
mech[8], eche[7], hece[7], emce[6], esce[5], esem[5],
che[6], ech[6], hec[6], hem[6], ehe[5], hes[5], mee[4], ces[4], mes[4], sem[4],
hm[5], eh[4], he[4], ce[3], em[3], me[3], ee[2], es[2], se[2],
