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:D
['GABc d2 fd Adfd']  
X:1
L:1/8
M:4/4
K:D
"D" dD D2 FDFA |"D" dfaf"A7" gfec |"D" dD D2 FDFA |"G" BGEF"A7" GABc |"D" dD D2 FDFA | 
"D" dfaf"Em" gfec |"D" d2 cd BdAF |"G" GBEF"A7" GABc :|"D" d2 fd Adfd |"D" d2 fd"A7" BAFA | 
"D" dafd Adfd |"G" BGEF"A7" GABc |"D" d2 fd Adfd | (3B"G"cd ef"Em" g3 ^g |"A7" afge fded | 
"A7" BGEF GABc |"D" d2 fd Adfd |"D" d2 fd"A7" BAFA |"D" dafd Adfd |"G" BGEF"A7" GABd | 
"D" a2 (3ba^g afdf |"G" gfed"Em" cbag |"A7" faec dBAF |"A7" GBEF GABc |]  