Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/4
M:4/4
K:C
['f e d', 'g f/e/ d d/e/ f e/d/ c', 'e d/c/']  
X:1
L:1/4
M:4/4
K:C
 c3/2 d/ e e | f e d f | e d c B | A2 G2 | c3/2 d/ e e | f e d f | e d c B | c2 c2 :: 
 g f/e/ d d/e/ | f e/d/ c e | d c B c | d2 d2 | g f/e/ d d/e/ | f e/d/ c e | d c c B | c2 c2 :: 
 e d/c/ e d/c/ | B c d2 | G A B c | d e d c | e d/c/ e d/c/ | B c d2 | G A B c | c B c2 :|  