Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
Q:3/8=100
M:6/8
K:F
['c2 F', 'Ffc A/B/cA']  
X:1
L:1/8
Q:3/8=100
M:6/8
K:F
"_Allegretto" c2 F AGF | GAG B2 d | c2 F AGA | Ffc AGF | dcd fcA | GAG B2 d | c2 F A2 G | 
 Ffc A2 F || Ffc A/B/cA | Ggd B2 G | Ffc A/B/cA | Ffc ABc | B/A/B/c/d/e/ fFA | GAG B2 f | 
 c2 B A2 G | Ffc A2 F |]  