Assemble a piece of music by merging the alphabetic representation of the predetermined musical pattern and the provided melodic theme.
X:1
L:1/4
Q:3/4=90
M:6/4
K:Amin
['A2 e e2 d e3/2 f/ g', 'B d2 G2 G']  
X:1
L:1/4
Q:3/4=90
M:6/4
K:Amin
 A2 e e2 d | e3/2 f/ g B3/2 A/ G | A2 B c2 d | e B2 A3 || B d2 G2 G | B d2 G2 G | A2 B c2 d | 
 e B2 A3 |]  