Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
Q:1/8=160
M:2/2
K:D
['A2 dcdB AGFA Bdce d2 ef gf', 'd2 fg agfg edcd BGFG E2 ga']  
X:1
L:1/8
Q:1/8=160
M:2/2
K:D
 A2 | dcdB AGFA | Bdce d2 ef | gf bagf ed | cdec A3 A | BGBd cAce | fdfa dcBA | dfeg fdec | 
 d2 d2 d2 :: fg | agfg edcd | BGFG E2 ga | bgfg edcd | ecdB A3 A | BGBd cAce | fefa dcBA | 
 dfeg fdec | d2 d2 d2 :|  