Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:3/4
K:D
['A2 A2 GF GA B2 c2 de', 'D2 fe fg fg ab e4 dc']  
X:1
L:1/8
M:3/4
K:D
 A2 A2 GF | GA B2 c2 | de fd ec | d4 D2 :: fe fg fg | ab e4 | dc Bc de | cB A4 | A2 A2 GF | 
 GA B2 c2 | de fd ec | d4 D2 :|  