Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
Q:1/8=120
M:6/8
K:A
['Ace ece fgf e2 A B2 B', 'gfe fgf g3 fga gfe |[M:3/8] f2']  
X:1
L:1/8
Q:1/8=120
M:6/8
K:A
|:"^A" Ace ece | fgf e2 A | B2 B cBA | F2 G A3 ::"^B" fga gfe | fgf g3 | fga gfe |[M:3/8] f2 g | 
[M:6/8] aba g2 e | fga e2 A | B2 B cBA | F2 G A3 :|  