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
['AFDF AFDF BEFG B2 G2']  
X:1
L:1/8
M:4/4
K:D
"D" AFDF AFDF |"G" BEFG B2 G2 |"A7" cBAB AGFG |"D" A2 B2 A4 | AFDF AFDF |"G" BEFG B2 G2 | 
"A7" cBAc f2 e2 |"D" d2 f2 d4 ||"A7" ecAc ecAc |"D" fdAd f2 d2 |"A7" gfed"Em" edcB | 
"D" dcBc"A7" A4 |"D" AFDF AFDF |"G" BEFG B2 G2 |"D" DEFD"A7" GECE |"D" D2 F2 D4 ||  