Produce a musical expression that follows the indicated alphabetical structure while integrating the provided thematic material.
X:1
L:1/8
M:2/4
K:Amin
['cd BA', 'A2 a2 e2 dc']  
X:1
L:1/8
M:2/4
K:Amin
 AB | cd BA | cd BA | B2 AG | cd BA | cd BA | e2 AB | cd BA | cd BA | B2 AG | A2 GE | DE GA | 
 BA Bc | dc BA | e2 || AB | A2 a2 | e2 dc | B2 AG | A2 a2 | e2 dc | e2 AB | A2 a2 | e2 dc | BA BG | 
 A2 GE | DE GA | BA Bc | dc BA | a2 ||  