Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/4
Q:1/2=100
M:3/2
K:Bmin
['f B2 f g2', 'd/e/ f F']  
X:1
L:1/4
Q:1/2=100
M:3/2
K:Bmin
 f B2 f g2 | e c2 d/e/ f B | f B2 f g2 | e d/e/ c f d B | f B2 f g2 | g f/g/ e d e A | f d2 a b B | 
 c d e c d2 || f d2 f/g/ a2 | e c2 e/f/ g2 | d B2 d/e/ f F | B c/d/e/d/ c/B/ ^A F | f B2 f g2 | 
 e c2 d/e/ f F | d B2 d c F | F B c ^A B2 |]  