Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:4/4
K:D
['A2 AF DFAF', 'cdef gfed']  
X:1
L:1/8
M:4/4
K:D
 A2 AF DFAF | GFEF GBdB | A2 AF DFAF | GBAG FDdB | A2 AF DFAF | GFEF GBdB | ABAF dcdA | 
 GBAG FD D2 || d4 d2 ed | cdef gfed | cAeA fAeA | cdef gfed | faeg afge | cege d>efg | afge fdec | 
 dABG FAdB ||"^Final" dBAF D2 D2 ||  