Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
M:2/4
K:F
['AABB c2 A z']  
X:1
L:1/8
M:2/4
K:F
 AABB | c2 A z | BBAA | A2 G z | AABB | c2 A z | ccEE | G2 F z | AABB | c2 A z | BBAA | A2 G z | 
 AABB | c f2 d | ccEE | G2 F z |]  