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:4/4
K:A
['e A3', 'ecAc dcdf ecAB', 'a A3 aAga b B3 bagf e2']  
X:1
L:1/8
M:4/4
K:A
 af | e A3 fAgA | afec BAFA | e A3 BAED | CEAB cAAf | e A3 fAgA | afec BAED | CEAE FAcA | 
 GBed cAAB || c2 cd ecAc | dcdf ecAB | ABcd ecAB | cBBA BcAB | c2 Ac ecAc | dcdf ecAB | cedf egfa | 
 gbeg aefg || a A3 aAga | b B3 bagf | e2 gb agfe | fe^df e2 fg | a A3 aAga | b B3 bagf | 
 e2 gb agfe | fdBG A2 ||  