fere[8], free[8], gren[6], negr[6], reng[6], gwer[6], nerw[4],
fee[7], fen[7], nef[7], ref[7], gen[5], erg[5], ner[3], ren[3], ewe[3], wen[3], rew[3], wre[3],
ef[6], fe[6], ee[2], en[2], er[2], re[2], ew[2], we[2],
