chno[7], chon[7], soch[7], noks[5], skon[5],
hoc[6], och[6], koc[5], noc[4], nok[4], soc[4], kos[4], sok[4], nos[3], son[3],
ho[4], oh[4], co[3], ko[3], ok[3], no[2], on[2], os[2],
