Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
M:2/4
K:Amin
['A>B cd eg ga eg/e/ dB', "ag ea ab c'b ag"]  
X:1
L:1/8
M:2/4
K:Amin
|: A>B cd | eg ga | eg/e/ dB | AB GE | A>B cd | eg ga | eg/e/ dB |1 BA e/d/c/B/ :|2 BA A2 |: 
 ea ab | c'b ag | ea ab | c'b ag | ea ab | c'b ag | eg/e/ dB |1 BA A2 :|2 BA e/d/c/B/ ||  