Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
M:4/4
K:D
['G2 F2 AF']  
X:1
L:1/8
M:4/4
K:D
|: A,2 |"D" D2 FE DEFA | dcde fdAF |"G" G2 BG"D" F2 AF |1"Em" EFGE"A7" DCB,A, :|2 
"A7" ECA,C"D" D2 :: CB, |"A7" A,B,CD EFGF | EDEF GABc |"D" dcdB ABde | fagf"A7" e2 A2 | 
"D" d2 fd"A7" c2 ec |"G" BcdB"D" AFDF |"G" G2 BG"D" F2 AF |"A7" ECA,C"D" D2 :|  