Produce a musical expression that follows the indicated alphabetical structure while integrating the provided thematic material.
X:1
L:1/8
Q:1/4=170
M:3/4
K:C
['', 'c2 z2', 'Bc d2 c2 BA G4 GG c2']  
X:1
L:1/8
Q:1/4=170
M:3/4
K:C
 GG |: c2 c2 cd | e2 e2 fe | d2 d2 ed |1 c2 z2 GG :|2 c2 z2 Bc :| d2 c2 Bc | d2 c2 Bc | d2 c2 BA | 
 G4 GG | c2 c2 cd | e2 e2 fe | d2 d2 ed | c4 |]  