bum[8], umb[8], bym[7], amb[6], bam[6], bim[6], aby[6], bai[5], aua[5], may[5], yam[5], maa[4], ima[4], mai[4],
bu[6], mu[5], by[5], ba[4], bi[4], au[4], my[4], ma[3], im[3], mi[3], aa[2],
