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:G
['d BGdB eAAc BGdB gdBG ceBd eAAc', 'gdcB eAAf gdcB']  
X:1
L:1/8
M:4/4
K:G
 d | BGdB eAAc | BGdB gdBG | ceBd eAAc | BGBd g2 g :| f | gdcB eAAf | gdcB dgdB | ceBd eAAc | 
 BGDB, G2 Gf | gdcB eAAf | gdcB dbdB | caBg aAAc | Bgba gedc ||  