Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/4
M:6/4
K:C
['B c']  
X:1
L:1/4
M:6/4
K:C
 A/A/ | E A A G A B | c d c (B c) d | e c A d B G | A3- A2 A | E A A G A B | c d c (B c) d | 
 e c A d B G | A3- A2 d | c d f (f/ e3/2) A/A/ | c e c (B/ d3/2) B | c B A A B c | B3 z2 A | 
 E A A G A B | c d c B (c d) | e c A e d B | A3- A3 |]  