Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/4
M:3/4
K:D
['d2 f/a/ g e c', 'A2 g/e/', 'd f f e g g f', 'e e f g Tf2 e/d/ e']  
X:1
L:1/4
M:3/4
K:D
 A | d2 f/a/ | g e c | d2 f/a/ | g e c | d f d | e g c | d f/d/e/c/ | d2 :: A | A2 g/e/ | f c d | 
 A2 g/e/ | f2 A | d2 f/a/ | g e c | d f/d/e/c/ | d2 :|[M:3/4]"^Trio" !fermata!A | d f f | e g g | 
 f (f/e/)(e/d/) | Tc2 A | d f f | e g g | f e/d/e/c/ | d2 :: e | e f g | Tf2 e/d/ | e e/f/g/e/ | 
 Tf2 A | d f f | e g g | f e/d/e/c/ | d2 :|  