Construct a musical work that combines the specified alphabet-based pattern with the given melodic theme.
X:1
L:1/8
M:4/4
K:G
['DG (3GGG FGAB cded cBAF DF (3FFF', 'ABcA ABcg f2 ef eddc cBBA dggf']  
X:1
L:1/8
M:4/4
K:G
 DG (3GGG FGAB | cded cBAF | DF (3FFF DFAB | (3cBA AG GFFE | DG (3GGG FGAB | cded cBAF | 
 DF (3FFF DFAc |1 BcAF G2 GF :|2 BcAF G4 || dggf g2 fg | aA (3AAA ABcA | ABcg f2 ef | eddc cBBA | 
 dggf g2 fg | aA (3AAA ABcA | aAAg AAfA | eddc cBBA :|  