brei[6], brie[6], birr[6], brew[6], brwi[6], rwie[4], wiew[4], werw[4],
bib[7], ber[5], erb[5], reb[5], brr[5], web[5], rei[3], wie[3], rew[3], wre[3], wir[3], wrr[3],
be[4], bi[4], er[2], re[2], ew[2], we[2], iw[2],
