popu[8], pupo[8], puno[7], poru[7], runo[6], urno[6], ruro[6],
pup[7], pun[6], opu[6], pop[5], nur[5], run[5], urn[5], oru[5], rur[5], por[4], pro[4], rop[4], prr[4], nor[3],
nu[4], op[3], po[3], no[2], on[2], or[2], ro[2],
