refem[10], berem[8], erbem[8], rebem[8],
efeb[10], febr[10], efem[9], ferm[9], fere[8], free[8], brem[7], rebe[6], erem[5],
fee[7], ref[7], bee[5], ber[5], erb[5], reb[5], mee[4], mer[4], rem[4],
ef[6], fe[6], be[4], em[3], me[3], ee[2], er[2], re[2],
