Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:4/4
K:D
['(3ABc d2 (ec)ABce dcAFDEFG', 'D2 A2 (3ABc defefg fdecdcAG A2 (AG)FGAB']  
X:1
L:1/8
M:4/4
K:D
 (3ABc | d2 (ec)ABce | dcAFDEFG | ABGAFGAB | c2 AA A2 (3ABc | d2 (ec)ABce | dcAFDEFG | ABGAFDEC | 
 D2 DD D2 :: A2 | (3ABc defefg | fdecdcAG | A2 (AG)FGAB | c2 AA A3 g | fdec d2 (cA) | BGAFDEFG | 
 ABGA FDEC | D2 DD D2 :|  