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
['fdd cAA BAG A2 G FAA def', 'FAA def']  
X:1
L:1/8
M:6/8
K:D
 fdd cAA | BAG A2 G | FAA def | gfg eag | fdd cAA | BAG A2 G | FAA def |1 gec d2 e :|2 gec dAG |: 
 FAA BAG | FAF BAG | FAA def | gfg eag | fdd cAA | BAG A2 G | FAA def | gec d3 :|  