buc[8], pub[8], obu[7], cup[7], puc[7], cab[6], cob[6], ecu[6], opu[6], abo[5], boa[5], oba[5], cap[5], pac[5], cep[5],
bu[6], ba[4], be[4], bo[4], au[4], ce[3], co[3], pa[3], pe[3], op[3], po[3], eo[2],
