bum[8], umb[8], bym[7], buz[7], bzu[7], emu[6], muz[6], bzy[6], bee[5], bez[5], mee[4], ezy[4],
bu[6], mu[5], by[5], be[4], my[4], em[3], me[3], ee[2], ez[2], ze[2],
