Produce a musical expression that follows the indicated alphabetical structure while integrating the provided thematic material.
X:1
L:1/8
M:4/4
K:G
['G2 GA', 'G2 (3def g2 gf gbag fefg a2']  
X:1
L:1/8
M:4/4
K:G
|: (3DEF | G2 GA B2 AB | cBAG E2 E2 | EFGE DEFG | AdBG E2 GE | D2 DE G2 GA | BGBd efge | 
 dBAG EDEG | (3ABA G2 G2 :: (3def | g2 gf gbag | fefg a2 a z | edef edBd | deed e2 ge | dBGB d3 d | 
 edef g2 fe | dBAG DEFG | (3ABA G2 G2 :|  