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 d2', '(ag) (fg)(ab)', 'Tc4 e2', '(ag) f2 d2']  
X:1
L:1/8
M:2/2
K:D
 (ag) | f2 d2 a2 d2 | (fg) a2 Tf4 | (AB)(cd) e2 A2 | Tc4 e2 (ag) | f2 d2 a2 d2 | (fg) a2 Tf4 | 
 (de)(fg) a2 d2 | Tf4 a2 (ga) | b2 g2 a2 f2 | g2 (eg) Tf4 | (AB)(cd) e2 A2 | Tc4 e2 (dc) | 
 B2 d2 A2 d2 | F2 e2 E2 d2 | (DE)(FG) A2 D2 | TF4 A2 :: (ag) | (fg)(ab) (af) d2 | 
 (ba)(fb) (af) d2 | (AB)(cd) eAaA | Tc4 e2 (ag) | (fg)(ab) .a(gfe) .a(fed) | .b(gfe) .a(fed) | 
 (d'c'ba gfed) | Tf4 a2 (ga) | bagb agfa | gfeg f2 d2 | (AB)(cd) eaAd | Tc4 e2 (dc) | 
 (Bd) Td2 (Ad) Td2 | (Fd) Td2 (Ed) Td2 | (DE)(FG) AGAD | TF4 A2 :: (ag) | f2 (d2 d)feg | 
 fa (d2 d)fed | .e(cBA) aefd | Tc4 e2 (ag) | .f(ded) .a(ded) | .b(ded) .a(ded) | (bc'd')b a(fed) | 
 Tf4 a2 (ga) | bgGb afFa | geE.g .f(ded) | b3 a (gf)(ed) | Tc4 e2 (dc) | .B(dcd) .B(dcd) | 
 .G(dcd) .E(dcd) | (DE)(FG) A2 D2 | TF4 A2 :: (ag) | f2 d2 D2 F2 | A2 d2 fa d'2 | (gf)(ed) b2 d2 | 
 Tc4 e2 (ag) | f2 d2 (AF) D2 | (af) d2 (AF) D2 | bafb .a(fed) | Tf4 a2 (ga) | bgdB GBdg | 
 afdA FAdf | .e(gfe) .b(gfe) | Tc4 e2 (dc) | B2 (Bd) A2 (Ad) | FBdF E2 d2 | (DE)(FG) A2 D2 | 
 TF4 A2 :|  