Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
M:4/4
K:Gmin
['(3ddd BG', 'cBAG FGAF']  
X:1
L:1/8
M:4/4
K:Gmin
|: (3ddd BG (3ddd BG | (3ccc AF f2 =ef | dcBA GBdg | dcBA BG (3GGG :| DGBGdGBG | cBAG FGAF | 
 DGBG DGBG | dedc BGGF | DGBG dGBG | cBAG FGAF | GABc dcdg | dcBA BG (3GGG ||  