Produce a musical expression that follows the indicated alphabetical structure while integrating the provided thematic material.
X:1
L:1/8
M:9/8
K:Bmin
['FGA GFE FED', 'a4 gf']  
X:1
L:1/8
M:9/8
K:Bmin
|: FGA GFE FED | c2 d edc dBA | FGA GFE FED | DEE EDF GFE | FGA GFE FED | c2 d edc dBA | 
 f3 efe dcA |1 gfe dcB AGE :|2 gfe dcd efa |: b2 f afe fed | c2 e dcB cBA | aAA gAA edc | 
 d2 c Bcd efa | b2 f afe fed | c2 e dcB cBA | GAB def gfg |1 a4 gf efa :|2 a4 gf ecA ||  