Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:6/8
K:D
['AFA Agf ede fdB AFA', 'afa afa']  
X:1
L:1/8
M:6/8
K:D
 A | AFA Agf | ede fdB | AFA AGF | GFG EFG | AFA Agf | ede fdB | AFA faf | ded d2 :| a | afa afa | 
 bgb bgb | afa afa | gfg efg | a3 f3 | ede fdB | AFA faf | ded d2 :|  