Construct a musical work using the letter-based representation of the specified pattern and the given melodic subject.
X:1
L:1/8
M:3/8
K:F
['FFG EDC FF/E/F/A/ G2 z BBB/B/ AGF']  
X:1
L:1/8
M:3/8
K:F
 FFG | EDC | FF/E/F/A/ | G2 z | BBB/B/ | AGF | GGA | FE/D/C | FFA | GF z |]  