Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
Q:3/8=90
M:12/8
K:D
['dAd dAd', 'ded fga Bcd']  
X:1
L:1/8
Q:3/8=90
M:12/8
K:D
|: d | dAd dAd dAd Tf2 d | Bcd dcd BeB Tc2 A | dAd dAd dAd Tf2 d | B/c/dB c/d/ec d3 D2"^NB" z |: 
 ded fga Bcd c2 A | ABc cBc ABc cBA | ded fga Bcd Tc2 A | B/c/dB c/d/ec d3 D3 :|  