Produce a musical expression that follows the indicated alphabetical structure while integrating the provided thematic material.
X:1
L:1/8
M:3/4
K:Gmin
['BA BA GA Bc']  
X:1
L:1/8
M:3/4
K:Gmin
 B>A G2 g2 | fa/f/ dd/c/ BA | BA GA Bc | de/c/ dB FD | B>A G2 g2 | ff/ dc BA | BA GA Bc | 
 c/d/e/c/ d2 D2 ||  