bero[6], ober[6], boro[6], robo[6], bose[6], boso[6], bers[6], oreo[4], eros[4], roso[4],
ber[5], erb[5], reb[5], bor[5], rob[5], ero[3], oro[3], oso[3], ser[3], ros[3],
be[4], bo[4], eo[2], er[2], re[2], or[2], ro[2], es[2], se[2], os[2],
