bece[7], obce[7], rebe[6], bero[6], ober[6], erce[5], cero[5], orce[5], oere[4],
cob[6], bee[5], ber[5], erb[5], reb[5], bor[5], rob[5], cer[4], ero[3],
be[4], bo[4], ce[3], co[3], ee[2], eo[2], er[2], re[2], or[2], ro[2],
