bum[8], umb[8], bun[7], bym[7], amb[6], bam[6], mun[6], aby[6], ban[5], aua[5], may[5], yam[5], maa[4], man[4], nam[4], ana[3],
bu[6], mu[5], by[5], ba[4], au[4], nu[4], my[4], ma[3], ny[3], aa[2], na[2],