Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
Q:1/4=168
M:9/8
K:none
['B2 A']  
X:1
L:1/8
Q:1/4=168
M:9/8
K:none
 d e2 d2 c{d} c2 B | B d2 c2 B B2 A | A c2 B2 A A2 G | G B2 AA G^F ED | DE ^FG A=B cd z | 
 d e2 d2 c{d} c2 B | B d2 c2 B B2 A | A c2 B2 A A2 G | G B2 A AG ^FE D | E G^F ED C D2 z |]  