Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/16
M:2/4
K:G
['D2GB A2G2 F2Ae d2c2 F2Ac E2F2', 'GGGG G2A2 eeee e2d2', 'g2g2 g4 z4 f4 e4']  
X:1
L:1/16
M:2/4
K:G
"G" D2GB A2G2 |"D7" F2Ae d2c2 | F2Ac E2F2 |"G" G2Bd gdBd | D2GB A2G2 |"D7" F2Ae d2c2 | F2Ac E2F2 | 
"G" G2B2 G2 z2 :|[K:D]"D" !>!A4 fed2 |"A7" cd^de a2g2 | cd^de f2e2 |"D" edcB A4 | !>!A4 fed2 | 
"A7" cd^de a2g2 | cd^de f2e2 |"D" d4 z2 dd |"D7" d2 !>!e4 AB | =c2A2 F2"_>Teil A" D2 |: 
[K:C]"C" GGGG G2A2 | !>!G4 !>!e4 |"G7" eeee e2d2 |"C" eeee e2c2 | GGGG G2A2 | !>!G4 !>!e4 | 
"G7" eeee e2d2 |"C" c2c2 c2"_Fine" z2 :|"Am" A^GAB c2A2 |"E7" ^GAB2 GAB2 |"Am" A^GAB c2A2 | 
"E7" e4 z2 ee | e2e2 e2e2 | e4 z2 gg |"G7" g2g2 g2g2 | g4 z4 |"Dm" f4 e4 |"G7" d4"_>Teil C" g4 |]  