Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:2/4
K:D
['FA AB/A/ GB Bc/B/ Ac c/B/c/d/', 'Bc/B/ Ac c/B/c/d/']  
X:1
L:1/8
M:2/4
K:D
|: FA AB/A/ | GB Bc/B/ | Ac c/B/c/d/ | ed B/c/d/B/ | FA AB/A/ | GB Bc/B/ | Ac c/B/c/d/ |1 ed d2 :|2 
 ed d>e |: fd Ad | cB Bc/B/ | Ac c/B/c/d/ | ed B/c/d/e/ | fd Ad | cB Bc/B/ | Ac c/B/c/d/ |1 
 ed d/c/d/e/ :|2 ed d2 ||  