nerpy[7], neper[6], pener[6],
nepy[6], peny[6], pery[6], repy[6], nerp[5], nery[5], reny[5],
pyr[5], ryp[5], nep[4], pen[4], per[4], rep[4], ery[4], ner[3], ren[3],
pe[3], ny[3], ee[2], en[2], er[2], re[2],
