Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
M:9/8
K:G
['AGE GED', 'Bdd ded BAG']  
X:1
L:1/8
M:9/8
K:G
 ABG AGE GED | (3EFG D DEG ABc | BGG AGE GED | EGD DEF G2 A :: Bdd ded BAG | Bdd edB A2 z | 
 Bdd ded BAG | AGE DEF G2 A :|  