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:D
['AF (3FEF DFAd', 'f2 df']  
X:1
L:1/8
M:4/4
K:D
 agfg efdB | AF (3FEF DFAd | BG (3GFG EFGE | FA A2 FAdf | agfg egdB | AF (3FEF DFAd | BGGF G2 ag | 
 faeg fd d2 :| a2 fd Adfd | efed cA A2 | a2 fa bged | Beed efge | f2 df g2 eg | f2 df edBA | 
 FA (3ABA GBag | faeg fd d2 :|  