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 ce', 'a2 faea caBa']  
X:1
L:1/8
M:4/4
K:A
 e2 | A2 ce A2 ce | f2 ec eaga | ABce ABce | cB B2 B2 e2 | A2 ce A2 ce | f2 ec eaga | faea caBa | 
 cA (3AAA A2 :| a2 | faea caBa | cA (3AAA A2 a2 | faea caBa | cB (3BBB B2 a2 | faea caBa | 
 cA (3AAA a3 e | (3fga ea caBa | cA (3AAA A2 :|  