piet[6], pite[6], pert[6], trep[6], trip[6], peri[5],
pet[5], pit[5], pie[4], per[4], rep[4], ret[4], ter[4], itr[4], tir[4], tri[4], rei[3],
pe[3], pi[3], et[3], te[3], er[2], re[2],
