Produce a musical expression that follows the indicated alphabetical structure while integrating the provided thematic material.
X:1
L:1/8
Q:1/2=100
M:2/2
K:Bb
['BdBG AcA^F G2 [G,G]2 [G,G]3 A BGBd', '[DB]4 Bdfb fdBd A2 c2 c4 GBAc']  
X:1
L:1/8
Q:1/2=100
M:2/2
K:Bb
 BdBG AcA^F | G2 [G,G]2 [G,G]3 A | BGBd AFAc | B2 [Bb]2 [Bb]3 B | BdBG A2 F2 | EGEC D2 F2 | 
 GEFG AFGA | [DB]2 [DB]2 [DB]4 :: Bdfb fdBd | A2 c2 c4 | GBAc BdBG | A2 F2 F2 TED | EGcB FAdc | 
 GBed cB A2 | GBAc dBcA | F2 A2 B4 :|  