Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:2/2
K:Amix
['cA (3BcB A2', 'cA (3BcB A2']  
X:1
L:1/8
M:2/2
K:Amix
 cAAB cAeA | cA A2 G3 B | cAAB cAeA |1 cA (3BcB A2 AB :|2 cA (3BcB A2 cd |: ea a2 efed | 
 cdef g2 fg | ea a2 efed |1 cA (3BcB A2 cd :|2 cA (3BcB A2 AB ||  