Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
M:4/4
K:D
['D2 FA DAFA', 'd2 fa']  
X:1
L:1/8
M:4/4
K:D
 D2 FA DAFA | A,2 CE A,ECE | D2 FA DAFA | (3Bcd (3efg (3fed (3cBA | D2 FA DAFA | A,2 CE A,ECE | 
 D2 FA DAFA | (3Bcd (3efg f<d dA || d2 fa gefA | B2 gf (3efd (3cBA | d2 fa gefd | 
 (3Bcd (3cde f<d dA | d2 fa gefA | B2 gf (3efd (3cBA | (3fga (3gfe (3dcB (3AGF | 
 (3GAB (3ABc (3dAG (3FGE ||  