brem[7], merg[7], peem[6], rebe[6], perm[6], erem[5],
beg[7], gem[6], bee[5], ber[5], erb[5], reb[5], erg[5], mee[4], mer[4], rem[4], per[4], rep[4],
be[4], em[3], me[3], pe[3], ee[2], er[2], re[2],
