Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:6/8
K:D
['GEF G2 E', 'Adc d2 e']  
X:1
L:1/8
M:6/8
K:D
 Add AcA | GEF G2 E | Ddd A/B/cA | GEF GED | AdB c2 A | GEF G2 E | DAF =cBA | BGE GED :: Adc d2 e | 
 fec d2 c | Adc d2 e | fdf ecA | Adc d2 e | f/g/af ecA | AGE =cBA | BGE GED :|  