Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:4/4
K:Amix
['', 'e>A A/A/A', 'a>A A/A/A']  
X:1
L:1/8
M:4/4
K:Amix
 a |: e>A A/A/A e>A (3fed | e>A A/A/A g2 f<a | e>A A/A/A e>A (3fed |1 B>G d/c/B g2 f<a :|2 
 B>G d/c/B g2 f>g || a>A A/A/A e>A A/A/A | a>A A/A/A g2 f>g | a>A A/A/A e>A (3fed | 
 B>G d/c/B g2 f>g | a>A A/A/A e>A A/A/A | a>A A/A/A g2 f>g | (3agf g>e f/af/ e>c | 
 B>c d>e g2 f<a ||  