pery[6], repy[6], pory[6], pyro[6], ropy[6], oper[5], pero[5],
opy[5], pyr[5], ryp[5], per[4], rep[4], por[4], pro[4], rop[4], ery[4], ero[3],
pe[3], op[3], po[3], eo[2], er[2], re[2], or[2], ro[2],
