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
['', 'BE E2', 'f2 fe']  
X:1
L:1/8
M:2/2
K:D
 dc |] BE E2 BEcE | BE E2 BcdB | cA A2 cAeA | ceef e2 dc | BE E2 BEcE | BE E2 BcdB | cA A2 cAeA | 
 ceef e2 de |] f2 fe dcBA | effe d3 e | f2 fe fgaf | ecAc e2 de | fgfe dcBA | effe d3 e | 
 f2 fe fgaf | ecAc e2 dc |]  