echa[7], heca[7], echo[7], heco[7], soch[7],
ach[6], cha[6], che[6], ech[6], hec[6], hoc[6], och[6], hao[5], has[5], hes[5], ces[4], soc[4], osa[3],
ha[4], eh[4], he[4], ho[4], oh[4], ce[3], co[3], eo[2], as[2], es[2], se[2], os[2],
