biec[7], nieb[6], brei[6], brie[6], birr[6], ceni[5], enci[5], ince[5], nice[5],
ben[5], bin[5], ibn[5], ber[5], erb[5], reb[5], brr[5], cie[4], cen[4], cne[4], cni[4], nic[4], cer[4], nie[3], rei[3], ner[3], ren[3], inr[3],
be[4], bi[4], ce[3], ci[3], en[2], in[2], ni[2], er[2], re[2],
