Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
Q:1/8=450
M:9/8
K:C
['[EA,,]2 A [AA,]2 c [cA,]2 A [cF,,]3', '[cF,,]3 [AF,]2']  
X:1
L:1/8
Q:1/8=450
M:9/8
K:C
|: [EA,,]2 A [AA,]2 c [cA,]2 A | [cF,,]3 [AF,]2 A [AG,]2 G | [AA,,]3 [AA,]3 :: 
 [EA,,]2 A [AA,]2 c [cA,]2 A | [cF,,]3 [AF,]2 c [eC,]3 | [eC,,]2 d [eC,]3 | 
 [eC,,]2 g [gC,]2 f [eC,]2 f | [eA,,]3 [dA,]3 [cA,]2 e | [eD,,]2 e [dD,]3 | 
 [cF,,]3 [AF,]2 d [dF,]2 d | [cG,,]3 [AG,]2 A [AG,]2 G | [AA,,]3 [AA,]3 :|  