Construct a musical work using the letter-based representation of the specified pattern and the given melodic subject.
X:1
L:1/8
M:2/2
K:D
['A2 (AB) ABde', 'a2 (ab) afde fedf']  
X:1
L:1/8
M:2/2
K:D
 A2 (AB) ABde | fedf edBd | A2 (AB) ABde |1 fedf e2 a2 :|2 fdec defg || a2 (ab) afde | fedf edBA | 
 a2 (ab) afde | fedf e2 (fg) | a2 (ab) afde | fedf edBA | (AB) ABde | fdec d2 f2 ||  