Produce a musical expression that follows the indicated alphabetical structure while integrating the provided thematic material.
X:1
L:1/8
Q:1/8=120
M:4/4
K:Emin
['Bc dcBc d2 ef', 'BAGB dc(3Bcd cB(3ABc BA G2 ABcd |[M:3/2]']  
X:1
L:1/8
Q:1/8=120
M:4/4
K:Emin
|:"^A" Bc | dcBc d2 ef | gagf e2 Bc | dcBc d2 ef |[M:3/2] gagf e6 ::"^B" z d | 
[M:2/2] c2 (3ccc BAGB | dc(3Bcd cB(3ABc | BA G2 ABcd |[M:3/2] efgf e6 :|  