pipo[6], popi[6], drop[6], dior[5],
dip[5], pod[5], pip[5], pop[5], doi[4], ido[4], poi[4], odr[4], ord[4], rod[4], por[4], pro[4], rop[4], roi[3],
id[3], do[3], od[3], pi[3], op[3], po[3], ii[2], or[2], ro[2],
