Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
Q:1/8=260
M:2/4
K:G
['dd cB', 'G2 GG AB cA dd cB AG']  
X:1
L:1/8
Q:1/8=260
M:2/4
K:G
 d | dd cB | Ad Gd | dd cB | Ad Gd | dd cB | Ad Gd | dd cB | Ad G2 |: GG AB | cA dd | cB AG | 
 A2 G2 :|  