Produce a musical expression that follows the indicated alphabetical structure while integrating the provided thematic material.
X:1
L:1/8
M:2/2
K:D
['a2 g f3 def', 'D)FA A2 A Add{fg} fef gfg']  
X:1
L:1/8
M:2/2
K:D
 f/g/ | a^gb a2 g | f3 def | efg ABc | dcB A2 (3(e/f/g/ | a)^gb a2 g | f3 def | gec ABc | 
 d2 d d2 :: (3(A,/B,/C/ | D)FA A2 A | Add{fg} fef | gfg e^de | ba^g a2 (A, | D)FA A2 A | 
 Add{fg} fef | gfg edc | dfe d2 :|  