chno[7], chon[7], hond[7], dhow[7], dnom[6], dwom[6], down[5],
hoc[6], och[6], mho[6], ohm[6], cod[5], doc[5], com[5], moc[5], dom[5], mod[5], odm[5], noc[4], dno[4], don[4], mon[4], nom[4], won[3],
hm[5], ho[4], oh[4], co[3], do[3], od[3], om[3], no[2], on[2],
