fere[8], free[8], sfer[8], eser[4], eses[4], sers[4], serw[4], wers[4],
fee[7], ref[7], fes[7], ser[3], ewe[3], rew[3], wre[3], swe[3],
ef[6], fe[6], ee[2], er[2], re[2], es[2], se[2], ew[2], we[2],
