Assemble a piece of music by merging the alphabetic representation of the predetermined musical pattern and the provided melodic theme.
X:1
L:1/8
Q:3/8=124
M:9/8
K:G
['DGG GFG BAG DAA AGA cBA DBB', 'FED dBc ded bgd cAB cdc afc']  
X:1
L:1/8
Q:3/8=124
M:9/8
K:G
 DGG GFG BAG | DAA AGA cBA | DBB BAB dcB | ede EAG FED :: dBc ded bgd | cAB cdc afc | BGA BcB gdB | 
 ABc BAG FED :|  