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:A
['A2 ec eccB', 'ce f2 ef a2 A2- |1 AcBA']  
X:1
L:1/8
M:4/4
K:A
|: A2 ec eccB | Acec e f3 | A2 ec eccB |1 AcBA FEEF :|2 AcBA F E3 |: f2 ef a2 c2- | cfec e2 ce | 
 f2 ef a2 A2- |1 AcBA F E3 :|2 AcBA FEEF ||  