Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
Q:3/8=120
M:6/8
K:C
['ecd e2 d', 'c2 g ecd ege dgd B2 A']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:C
 g | ecd e2 d | egB cBA | GcG E2 D | Edd d2 f | ecd e2 d | eg_B A=Bc | dfa gec | Gcc c2 :: g | 
 ecd ege | dgd B2 A | B^FG cBA | Bdd d2 f | egc Bdf | egG ABc | dfa gec | Gcc c2 :|  