Create a musical piece with the provided alphabetic notation system and theme.
X:1
L:1/4
M:3/4
K:F
['A F']  
X:1
L:1/4
M:3/4
K:F
 A | F E D | A2 d | A3/2 G/ F | G2 A | (F E) D | D F G | A3 | z A =B | c3/2 =B/ c | (A =B) c | 
 d =B A | G2 d | c3/2 A/ G | A F D | (D C2) | (F3/2 G/) A | _B A G | A F E | D3- | D z ||  