Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:6/8
K:A
['', 'AFA cAc f2 g agf ecB', 'ecB ABA GFE aff cff aff cfg']  
X:1
L:1/8
M:6/8
K:A
[K:F#min]|: FCF AFA | cAc f2 g | agf ecB | ABA GFE | FCF AFA | cAc f2 g | agf ecB |1 AFF F2 c :|2 
 AFF Ffg |: aff cff | aff cfg | agf ecB | ABA GFE | aff cff | aff cfg | agf ecB |1 AFF Ffg :|2 
 AFF F2 G ||  