unaM udeB is a Latvian folksong "Bedu, manu lielu bedu", but sung in mirror fashion, beginning at the end. The melody is based on the original verse and refrain of the folksong, which has been harmonised for male choir from the last note to the first. The piece was composed for the female voices of the mixed choir "Maska", but later arranged for male choir. The arrangement is complemented with body percussion.