Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/4
M:2/4
K:D
['A A', 'd d', '', 'g g', "d' d'"]  
X:1
L:1/4
M:2/4
K:D
 f/A/f/e/ d/c/d/B/ | B A A A | G/A/c/e/ a a | F/A/d/f/ a a | f/A/f/e/ d/c/d/B/ | B A A A | 
 G/A/c/e/ a3/2 c/ | d d d z :: a g/a/ b/a/g/f/ | d c c c | a b/a/ b/a/g/f/ | e d d d | 
 a g/a/ b/a/d'/f/ | f e e e/b/ | (a/c/)(c/b/) (a/c/)(c/e/) | d d d z :|S |: d3 g | g f f g | 
 a g a b | a g g d | d3 g | g f f g | a g a b |1 g g g z :|2 g g g || d'/d'/ | d'2 z d'/d'/ | 
 d'2 z d'/d'/ | d' d' d' d' | d'2"^D.S." z2 |]  