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
['BAFB AFEF D2 FA BAdB BAFB AFAB']  
X:1
L:1/8
M:4/4
K:D
 BAFB AFEF | D2 FA BAdB | BAFB AFAB | dzfd efdB | BAFB AFEF | D2 FA BAdB | BAFB AFAB | dzfd edBc | 
 d2 fd efgb | afdf edBc | dzfd efga | beaf e3 f | d2 fd efgb | afdf efd z | defg adfb | 
 afdf e2 dB |]  