febr[10], fibr[10], efir[8], efor[8], obie[6], brei[6], brie[6], bero[6], ober[6], brio[6], broi[6], robi[6], birr[6],
fob[9], efo[7], ref[7], for[7], orf[7], frr[7], boi[5], obi[5], ber[5], erb[5], reb[5], bor[5], rob[5], brr[5], rei[3], ero[3], roi[3],
ef[6], fe[6], fi[6], be[4], bi[4], bo[4], eo[2], er[2], re[2], or[2], ro[2],