opera[6], pareo[6], raper[6], peror[6],
pera[5], repa[5], opar[5], paro[5], pora[5], rapo[5], ropa[5], oper[5], pero[5], parr[5],
par[4], rap[4], per[4], rep[4], por[4], pro[4], rop[4], prr[4], era[3], rea[3], aro[3], ora[3], ero[3],
pa[3], pe[3], op[3], po[3], eo[2], ar[2], er[2], re[2], or[2], ro[2],
