Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/4
M:4/4
K:F
['G E']  
X:1
L:1/4
M:4/4
K:F
 C2 F F | E3/2 F/ G E | A c A B | A2 d2 | c3/2 B/ A G/A/ | B G E C | F C A, D | C2 D2 :|  