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']  
X:1
L:1/8
M:6/8
K:G
 dcA AGA | BGF G2 B | dBA ABd | ege edB | ABA AGA | BGE G2 A | GED G2 A | Bdd edB | A3 AGA | 
 BGF G2 B | dBA ABd | ege edB | ABA AGA | BGE G2 A | GED G2 A | Bdd edB |: def g2 b | agf g2 e | 
 def g2 a | bee edB | def g2 b | agf g2 a | bgg agf | e2 d efg :|  