Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:6/8
K:G
['A2 F D2', 'A2 F']  
X:1
L:1/8
M:6/8
K:G
|: BAB G2 F | E2 F G2 A | BAB dcB |1 A2 F D2 D :|2 A2 F D2 c |: BGB d2 c | BGB d2 c | BGB dcB |1 
 A2 F D2 c :|2 A2 F D3 |]  