pfe[8], fen[7], nef[7], ref[7], gen[5], erg[5], nep[4], pen[4], per[4], rep[4], ner[3], ren[3], wen[3], rew[3], wre[3],
ef[6], fe[6], pe[3], en[2], er[2], re[2], ew[2], we[2],
