Produce a musical expression that follows the indicated alphabetical structure while integrating the provided thematic material.
X:1
L:1/8
Q:1/8=180
M:4/4
K:Amin
['aged BGGA', 'eg agab']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:Amin
 eg | aged BGGA | BGdG Bde^f | aged BGGA | BGdB A2 eg | aged BGGA | BGdG Bde^f | ageg dGGA | 
 BGdB A2 || eg | agab g2 eg | agab gedg | eaa/b/a gaba | (3e^fg dB A2 eg | agab g2 eg | 
 a3 ^f gedg | eaa/b/a g2 bg | (3e^fg dB !fermata!A2 ||  