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
M:4/4
K:G
['d2 dc B2 BA GFGA B2 G2', 'dedc BcBA GFGA B2 G2 ABcA G2']  
X:1
L:1/8
M:4/4
K:G
 d2 dc B2 BA | GFGA B2 G2 | ABcA G2 F2 | G2 B2 B2 A2 | d2 dc B2 BA | GFGA B2 G2 | ABcA G2 F2 | 
 G2 B2 G4 :| A2 AB c2 A2 | BABc d2 A2 | d2 dd e2 g2 | fed^c d2 (3AB=c | dedc BcBA | GFGA B2 G2 | 
 ABcA G2 F2 | G2 B2 B2 A2 | dedc BcBA | GFGA B2 G2 | ABcA G2 F2 | G2 B2 G4 ||  