Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:3/4
K:A
['A>ce f>ga', 'f>ed c<ec B>cd cag f>ed c<a g/f/', 'e>ga f<ed c<eE F<dc B>AG A3 |1']  
X:1
L:1/8
M:3/4
K:A
|: z cd | e>ce | dcB | A>ce | f>ga | e>cA | f>ed | d<cA | B2 c/d/ | e>ce | d<cB | A>ce | f>ga | 
 e<cA |1 dcB | A3 :|2 d<BG | A3 || z ag | f>ed | c<ec | B>cd | cag | f>ed | c<a g/f/ | e>cA B3 |: 
 f>ga | e>ga | f<ed | c<eE | F<dc | B>AG | A3 |1 z ag :|2 z3 ||  