echem[9], echom[9], hecom[9], ochom[9],
mech[8], eche[7], hece[7], echo[7], heco[7], home[7], homo[7], emce[6], moce[6],
che[6], ech[6], hec[6], hem[6], hoc[6], och[6], mho[6], ohm[6], ehe[5], com[5], moc[5], oho[5], mee[4], omo[4],
hm[5], eh[4], he[4], ho[4], oh[4], ce[3], em[3], me[3], co[3], om[3], ee[2], eo[2],
