Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:2/2
K:G
['G2 BG', 'AcBA G2', 'gede cBAc']  
X:1
L:1/8
M:2/2
K:G
|:"^A" (Bd) |"^*" g2{a} gg{a} ged(e | f2) ff fedf | gfga gedB |"^**" c2 Ac{Bc} BBAF |1 
[M:2/4]{F} G2 :|2 G ||"^B" DEF | G2 BG dGBG |{=FG} =F2 AF cFA^F | G2 BG dG .B2 | 
[M:3/2] AcAF .G2 (DG) dGDG |[M:2/2]{=FG} =F2 AF cFA^F | G2 BG dG .B2 | AcAF{F} G2 A2 | BGGG BGGd | 
 BGGG BGGd | BGGG BGGd | A=FFc AFFF | A=FFc AFFF | A=FFc AFFA |{A} [GB]3 A BA G2 | AcBA G2 || 
"^C" D2 |[M:3/2]{c} B2{Bc} BA BBdB .c2 BB |[M:2/2] AB{c}BA BAGA | 
[M:3/2] ([DA]<B){Bc}BA BBdB c2 B2 |[M:2/2] AcBA GDGA |[M:3/2] ([DA]<B)BA BBdB c2 (B/c/B) | 
[M:2/2] ABBA BAGA |[M:3/2] ([DA]<B){Bc}BA BBdB ccBB |[M:2/2] AcBA G2 |:"^D" Bd |{ga} g2 dg bgba | 
 f2 df afdA | [GB]2{c} BA{Bc} B2 dB |1[M:3/2] .c2 BB AcBA G2 :|2[M:2/2] .c2 BB AcBA | 
 G2 g2{a} gage | !>!d2 z B cAFA | G6 ||"^Substitutions:""^*" g2{ga} gf gede ||"^or" gfga gede || 
"^**" cBAc BBAF ||  