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
['c2 BA e2 fe', 'gaed B2 Bc d/c/BcA', 'B EGBd-dcBA A/B/cdc- cd B2 E3 d-dcBA']  
X:1
L:1/8
M:4/4
K:A
|: c2 BA e2 fe | A/B/cdc- cd B2 | c2 BA e2 fe | A/B/cde cd B2 :: gaed B2 Bc | d/c/BcA Bcde | 
 gaed B2 Bc | d/c/BcA B3 B :: EGBd-dcBA | A/B/cdc- cd B2 | E3 d-dcBA | A/B/cde cd B2 :|  