pfe[8], beg[7], ref[7], frr[7], gem[6], ber[5], erb[5], reb[5], erg[5], brr[5], mer[4], rem[4], per[4], rep[4], prr[4],
ef[6], fe[6], be[4], em[3], me[3], pe[3], er[2], re[2],
