Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/16
M:2/4
K:C
['', "dbdb d2d^d ec'ec' e2e=f", 'd6 A2']  
X:1
L:1/16
M:2/4
K:C
 GG"^A" |:"C" !>!g4 g2ee |"G7" f2B2 d4 | gbb2 gaa2 |"C" gage c2GG | !>!g4 g2ee |"G7" f2B2 d4 | 
 gbb2 a2B2 |1"C" c2e2 c2GG :|2"C" c2e2 c2Bc"^B" |:[K:G]"G" dbdb d2d^d |"C" ec'ec' e2e=f | 
"D7" ^fd'd'f"C" ec'c'e |"G" dc'ba g2Bc | dbdb d2d^d |"C" ec'ec' e2e=f |"D7" ^fd'd'f ec'ba |1 
"G" g2b2 g2Bc :|2"G" g2b2 g2G"_>Teil A" G |:[K:F]"^C""F" c4 f2e2 | d6 A2 | d6 A2 |"C7" B2f2 e4 | 
 c4 f2e2 | d6 B2 | d6 B2 |"F" A2d2 c4 | c4 f2e2 | d6 A2 | d6 A2 |"Gm/Bb" B2a2 g4 | d4 a2g2 | 
"F" f6 A2 |"C7" d6 c2 |"F" F2f2 f2 z2 :|  