Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:6/8
K:G
['e dBG AGA B2 G GED GFG', 'd2 e']  
X:1
L:1/8
M:6/8
K:G
 e | dBG AGA | B2 G GED | GFG GAB | BAG A2 e | dBG AGA | B2 G GED | GFG GAB | AGF G2 :: z | 
 GAB/c/ d2 d | d2 e dBG | GAB/c/ d2 e | dBG ABA | GAB d2 d | d2 e dBd | e3 dBA | AGF G2 :|  