proc[6], port[6], prot[6], trop[6], ront[5], tron[5], norn[4],
pop[5], pot[5], top[5], noc[4], por[4], pro[4], rop[4], not[4], ton[4], ort[4], rot[4], tor[4], non[3], nor[3],
co[3], op[3], po[3], ot[3], to[3], no[2], on[2], or[2], ro[2],
