anch[7], chan[7], chna[7], chno[7], chon[7],
ach[6], cha[6], hoc[6], och[6], han[5], hao[5], cna[4], noc[4], ano[3], ona[3],
ha[4], ho[4], oh[4], co[3], na[2], no[2], on[2],
