bero[6], ober[6], bron[6], nero[4], orne[4],
ben[5], bon[5], ber[5], erb[5], reb[5], bor[5], rob[5], eon[3], one[3], ner[3], ren[3], ero[3], nor[3],
be[4], bo[4], en[2], eo[2], no[2], on[2], er[2], re[2], or[2], ro[2],
