izotop[8],
pitii[7], pitio[7], opito[7], ptozo[7],
tipi[6], pito[6], topi[6], ptoz[6], pozo[5], ozoi[4],
pit[5], pot[5], top[5], poi[4], toi[4], oto[4], zip[4], iii[3], zoo[3],
pi[3], op[3], po[3], ot[3], to[3], ii[2], oz[2],
