chno[7], chon[7], soch[7], hops[7], shop[7], snob[6], snop[5],
cob[6], hoc[6], och[6], hop[6], bon[5], noc[4], soc[4], osp[4], nos[3], son[3],
bo[4], ho[4], oh[4], co[3], op[3], po[3], no[2], on[2], os[2],
