Construct a musical work using the letter-based representation of the specified pattern and the given melodic subject.
X:1
L:1/8
M:4/4
K:D
['', 'e2 cA', 'eaaf gfed']  
X:1
L:1/8
M:4/4
K:D
 cd |: e2 cA eAcA | Aeec defa | e2 cA eA c2 | BABc defa | e2 cA eAcA | Aeec defa | e2 cA eA c2 | 
 BABc defd |: eaaf gfed | eaaf g2 fd | eaaf gfed | cABc defd | eaaf gfed | eaaf g2 fg | afge faed | 
 BGGd BGBd :|  