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:G
['G2 A', 'def g2 g f2 f']  
X:1
L:1/8
M:6/8
K:G
|:{c} BAA AGA | BGG G2 A | BAA ABd | efe edB | BAA AGA | BGG G2 A | GED G2 A | Bdd dBA :: 
 def g2 g | f2 f e2 e | def g2 g | f2 f edB | def g2 g | f2 f e2 e | dBA ABd | efe edB :|  