Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/4
Q:1/4=120
M:4/4
K:D
['E F', 'd c']  
X:1
L:1/4
Q:1/4=120
M:4/4
K:D
"^A" D E F D | G A B2 | E F G A/G/ | F G A2 | A D F A | d e f2 |{ga} g e B c | d2 d2 || 
"^B" d e f d | c d e2 | B c d e/d/ | c B A B/c/ | d A F D | G/A/ B A2 | B/c/ d c e | d2 d2 ||  