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
['GBG gbg GBG g3 efg', 'd3 Bcd ege dcB c3 BAG A3']  
X:1
L:1/8
M:6/8
K:G
|: GBG gbg | GBG g3 | efg DB,G, | FGA AFD | GBG gbg | GBG g3 | efg fed | e3 d3 :: Bcd ege | 
 dcB c3 | BAG A3 | GFE D3 | GBG gbg | GBG g3 | efg dcB | A3 G3 :|  