berem[8], erbem[8], rebem[8], serem[6],
brem[7], rebe[6], bers[6], erem[5], esem[5], eser[4],
bee[5], ber[5], erb[5], reb[5], mee[4], mer[4], rem[4], mes[4], sem[4], ser[3],
be[4], em[3], me[3], ee[2], er[2], re[2], es[2], se[2],
