Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/16
M:2/4
K:A
['A2A2 ABcd edcB', 'e2e2e2 E2 B2B2 Bcde fdBA GBGE e2e2']  
X:1
L:1/16
M:2/4
K:A
 E2 | A2A2 ABcd | edcB ABcA | B2B2 Bcde | fdBA GBGE | A2A2 ABcd | edcB A2a2 | gbge faf^d | 
 e2e2e2 :: E2 | B2B2 Bcde | fdBA GBGE | e2e2 efga | bged ceae | f2d2 dfaf | e2c2 ceae | cecA BdBG | 
 A2A2A2 :|  