chno[7], chon[7], chor[7], ochr[7], morn[5], norm[5],
hoc[6], och[6], mho[6], ohm[6], com[5], moc[5], hor[5], rho[5], noc[4], mon[4], nom[4], mor[4], nor[3],
hm[5], ho[4], oh[4], co[3], om[3], no[2], on[2], or[2], ro[2],
