Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
Q:1/4=100
M:2/4
K:D
['a/g/ fddf eAAG FdEc dD Da/g/ fddf', 'cAA d dAB=c BGGe eBcd cAAG Fafd']  
X:1
L:1/8
Q:1/4=100
M:2/4
K:D
|: a/g/ | fddf | eAAG | FdEc | dD Da/g/ | fddf | ea^gb | afed | cAA :: d | dAB=c | BGGe | eBcd | 
 cAAG | Fafd | Egec | dBAG | FDD :|  