erbie[7], serie[5], serir[5], sierr[5],
rebe[6], brei[6], brie[6], birr[6], bies[6], bers[6], esie[4], eser[4], sire[4],
bee[5], ber[5], erb[5], reb[5], brr[5], bis[5], rei[3], eis[3], sie[3], ser[3], sir[3],
be[4], bi[4], ee[2], er[2], re[2], es[2], se[2], si[2],
