Assemble a piece of music by merging the alphabetic representation of the predetermined musical pattern and the provided melodic theme.
X:1
L:1/8
M:6/8
K:Amix
['c2 A ABA', 'c2 e']  
X:1
L:1/8
M:6/8
K:Amix
 c2 A ABA | d2 e fed | c2 A ABA | B2 g gdB | c2 A ABA | d2 e fec | dfd cac | B2 g gdB :: c2 e efe | 
 efg aed | c2 e efg | B2 g gdB | c2 e efe | efg aec | dfd cac | B2 g gdB :|  