Produce a musical expression that follows the indicated alphabetical structure while integrating the provided thematic material.
X:1
L:1/8
M:6/8
K:D
['fAA fAA BAG FGE DED AFA def', 'f3 g3 afd']  
X:1
L:1/8
M:6/8
K:D
 fAA fAA | BAG FGE | DED AFA | def e2 d | fAA fAA | BAG FGE | DED AFA | def e2 d :: f3 g3 | 
 afd edB | f3 g3 | afd e3 | f3 g3 | afd edB | A3 AFA | def e2 d :|  