Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
Q:1/8=232
M:4/4
K:G
['GA Bc d2']  
X:1
L:1/8
Q:1/8=232
M:4/4
K:G
|: GA Bc d2 Bc | dB gd bg dB | GA Bc d2 Bd | cA af dc BA | GA Bc d2 Bc | dB gd bg dB | 
 GA Bc d2 Bd | cA af dc BA | BG GG DG GG | BG GB de dc | BG GG DG GG | FG AB ce dc | BG GG DG GG | 
 BG GB de dc | Bd gf ed cB | AG FE DG G2 :|  