Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:2/4
K:A
['AF EC E2 EF AA BA/B/', 'A A/B/ cB cd e2 dc Bf']  
X:1
L:1/8
M:2/4
K:A
 c/B/ | AF EC | E2 EF | AA BA/B/ | cB Bc/B/ | AF EC | E2 EF | AA BA/B/ | cA A :| A/B/ | cB cd | 
 e2 dc | Bf fe | fB Bc/B/ | AF EC | E2 EF | AA BA/B/ | cA A :|  