Create a musical piece that integrates the provided motif and follows the prescribed alphabetical structure.
X:1
L:1/8
Q:1/4=120
M:2/2
K:Gmix
['FDCD [_B,F]2 [B,F][B,F] DFGA', 'ef- fga(f g)e d2 cAGA F3 G-']  
X:1
L:1/8
Q:1/4=120
M:2/2
K:Gmix
"^Quick" (A |"^*" B)cdB cAGG | FDCD [_B,F]2 [B,F][B,F] | DFGA GFGA | BdcA [GB]2 [GB]2 | BcdB cAGA | 
 FDCD [_B,F]2 [B,F][B,F] | DFGA GFDC |1 D G2 A G3 :|2 D G2 A G4 |:"^**" GABc d3 (e | f2) ge f2 c2 | 
 f g2 a gfdf | gagf [df]2 ef- | fga(f g)e d2 | cAGA F3 G- | GAGF DCB,C | (D(G) [GB]2) [GB]4 :| 
"^Substitution:""^*" ([G-A] | [GB]2) G2 [FA]2 [FA]2 | DFDC _B,2 [B,F]2 ||"^**" [GB]A[GB]c d3 e ||  