Produce a musical expression that follows the indicated alphabetical structure while integrating the provided thematic material.
X:1
L:1/8
M:4/4
K:Amix
['e2 d<e', 'BcdB =G<G B2', 'eaga eAcA', 'B2 eaga eAcA eaga cA g2 afge']  
X:1
L:1/8
M:4/4
K:Amix
 a | e2 d<e f2 d<f | e2 d<e A<AcA | e2 d<e f2 d<f | d2 =Gd BG B :| e>dec ABcd | eaec A<A c2 |1 
 e>dec A<AcA | BcdB =G<G B2 :|2 defd cdec | BcdB =G<G B2 || A<A cA cAcA | A<A cAcA c2 |1 
 A<A cA cAcA | B=GGG BG B2 :|2 defd cdeB | BcdB =G<G B2 || eaga eAcA | eaga eA c2 | eaga eAcA | 
 B=GGG BG B2 | eaga eAcA | eaga cA g2 | afge fdec | d=GGG BG B2 ||  