pinio[6], piono[6],
nipo[5], pion[5], opon[5], pono[5], inio[4],
nip[4], pin[4], pni[4], poi[4], ino[3], oni[3], ono[3],
pi[3], op[3], po[3], ii[2], in[2], ni[2], no[2], on[2],
