Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
M:6/8
K:Bb
['A3/2 B/ c']  
X:1
L:1/8
M:6/8
K:Bb
 (G/A/) | B3/2 A/ G ^F=EF | GAG (^F3/2 G/) A | B3/2 c/ d A3/2 B/ c | (BA) G ^F2 F | 
 G3/2 A/ B A3/2 B/ c | d2 d(dc) B | A2 G ^F=EF | GGD G2 ||  