Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:4/4
K:Amin
['A B c']  
X:1
L:1/8
M:4/4
K:Amin
 e2 a2 ^f2 ^g2 | a2 g ^f e3 f | g a g f e2 d c | B A B c A4 | e2 a2 ^f2 ^g2 | a2 g ^f e3 f | 
 g a g f e2 d c | B A B c A4 | c d e ^f e2 d c | B A B c A4 | c d e ^f e2 d c | B A B c A4 | 
 c2 c2 G2 G2 | A B c d e3 ^f | g a g ^f e2 d c | B A B c A4 | c2 c2 G2 G2 | A B c d e3 ^f | 
 g a g ^f e2 d c | B A B c A4 ||  