Construct a musical work using the letter-based representation of the specified pattern and the given melodic subject.
X:1
L:1/8
M:6/8
K:F
['Acf dcB', 'F2 aga def gfg cde fef def']  
X:1
L:1/8
M:6/8
K:F
 F | Acf dcB | A3 G F2 | BAB GAB | AFF F3 B | Acf dcB | A2 c f3 | (d/e/fd) (e/f/ge) | f3 F2 :: 
 aga def | gfg cde | fef def | ecc c3 | afd gec | dBG cAF | dcB AGF | CFF F3 :|  