chno[7], chon[7], soch[7], snom[5],
hoc[6], och[6], mho[6], ohm[6], com[5], moc[5], noc[4], mon[4], nom[4], soc[4], osm[4], som[4], non[3], nos[3], son[3],
hm[5], ho[4], oh[4], co[3], om[3], no[2], on[2], os[2],
