Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/16
M:3/4
K:Amin
['', 'c2BA ^GABA G2GB A2AB', 'Bedc dcBA ^G2A2']  
X:1
L:1/16
M:3/4
K:Amin
 Bd |: c2BA ^GABA G2GB | A2AB cB^GB BeBd | c2BA ^GABA G2GB | A2AB cB^GB e2e2 :: efed cdcB A^GAB | 
 Bedc dcBA ^G2A2 | B2e2 edfd e4 | e2>d2 c2BA ^G2AB | Bedc dcBA ^G2A2 | BcBA ^G2E2 AGAB |1 
 cBA^G A4 A4 :|2 cBA^G A4 A2 ||  