Craft a musical composition that adheres to the specified musical theme and letter-based structure.
X:1
L:1/4
M:2/2
K:A
['d c B']  
X:1
L:1/4
M:2/2
K:A
 E |"A" A2 c B/A/ |"E7" B2 E d |"A" c2"E7" B2 |"A" A/G/ A/B/"^(E7)" A B |"A" c A E c |"E" B3 A | 
"E" G e"B7" F ^d |"E" e3 :: c/d/ |"A" e2"D" f3/2 e/ |"E7" d c B e |"^(D)" d c B A | 
"E7" G/A/ B/G/ E F/G/ |"A" A G/A/"E7" B A/B/ |"A" c B/c/"D" d e/d/ |"A" c B/A/"E7" E G |"A" A2 A :|  