Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
Q:3/8=110
M:6/8
K:D
['D FDF', 'd2 a afd gec def gfe fag']  
X:1
L:1/8
Q:3/8=110
M:6/8
K:D
 D | FDF AFA | d2 d d2 D | FDF AGF | E2 E E2 D | FDF AFA | d2 d d2 f | agf gfe | d2 d d2 :: a | 
 afd gec | def gfe | fag fed | e2 e e2 a | bfg agf | (e/f/g)e cBA | Bgf edc | d2 d d2 :|  