Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
M:9/8
K:F
["c'2 a afa afa", 'b2 g']  
X:1
L:1/8
M:9/8
K:F
 a/b/ | c'2 a afa afa | f'2 d' d'bd' f'd'b | c'2 a afa afa | g2 g gc'b agf :: f/g/ | a2 a afa afa | 
 b2 g geg b2 g | b2 c' bab agg | c'2 c' c'db a2 f :|  