buca[9], buce[9], boyu[9], bacy[8], caby[8], coby[8], obcy[8], baca[7], caba[7], bace[7], baco[7], coba[7], obca[7], obce[7], boya[7], boye[7],
buc[8], obu[7], cab[6], cob[6], ecu[6], aby[6], boy[6], oby[6], abo[5], boa[5], oba[5], aua[5],
bu[6], by[5], ba[4], be[4], bo[4], au[4], ce[3], co[3], aa[2], eo[2],
