bumy[10], bums[9], cumy[9], busy[9], musy[8], sumy[8], cymy[8], mycy[8],
buc[8], bum[8], umb[8], cum[7], muc[7], bus[7], bym[7], mus[6], sum[6], cym[6], myc[6],
bu[6], mu[5], by[5], su[4], my[4],
