Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
M:2/4
K:Bmin
['Bc de fg fe d/c/B dc', 'Bc de fg']  
X:1
L:1/8
M:2/4
K:Bmin
|: Bc de | fg fe | d/c/B dc | B2 BA :: Bc de | fg af | fg ef | d2 dc | Bc de | fg fe | d/c/B dc | 
 B2 BA :|  