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
['BGG/A/G BGdG BGGA Bdgd BGGF FGBc AGFG', 'ABcA Bdgd', 'Bdgd edgd']  
X:1
L:1/8
M:4/4
K:G
 BGG/A/G BGdG | BGGA Bdgd | BGGF FGBc | AGFG ABcA | BDGA BGcG | BDGA Bdgd | B/d/BAc ABcB | 
 AGFG ABcA || Bdgd B3 d | fgag fgaf | gfgd ABcB | AGFG ABcA | Bdgd BGBd | g/a/geg fgaf | 
 g2 gf gedB | cBAG FGAc || Bdgd edgd | Bdgd BGGB | Acfc Acfc | A/B/cfc BDGA | Bdgd edgd | 
 Bdef g3 a | b/a/g a/g/f gedB | cBAG FGAc ||  