Craft a music piece according to the prescribed structure and the input theme.
X:1
L:1/8
M:6/8
K:A
['A B2', 'e f2'  
X:1
L:1/8
M:6/8
K:A
 A2 A B2 d | c2 A B2 G | A2 d cec | dBG A3 :: e2 e f2 d | f2 b g2 e | f2 g agf |{f} e2 d c3 | 
 A2 A B2 d | c2 A B2 G | A2 d cec | dBG A3 :|  