echem[9],
mech[8], bece[7], eche[7], hece[7], emce[6],
che[6], ech[6], hec[6], hem[6], bee[5], ehe[5], mee[4],
hm[5], be[4], eh[4], he[4], ce[3], em[3], me[3], ee[2],
