chno[7], chon[7], chor[7], ochr[7], rock[6], kron[5],
hoc[6], och[6], koc[5], hor[5], rho[5], noc[4], nok[4], kor[4], kro[4], okr[4], ork[4], rok[4], nor[3],
ho[4], oh[4], co[3], ko[3], ok[3], no[2], on[2], or[2], ro[2],
