buc[8], obu[7], bru[7], bur[7], cab[6], cob[6], cru[6], abo[5], boa[5], oba[5], arb[5], bar[5], rab[5], bor[5], rob[5], aur[5], oru[5], car[4], rac[4], aro[3], ora[3],
bu[6], ba[4], bo[4], au[4], co[3], ar[2], or[2], ro[2],