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:D
['', 'dBAB de{a}fe', 'fa f2 f2']  
X:1
L:1/8
M:4/4
K:D
 (3.A.B.c |: dBAB de{f}fe | dBAB e2 fe | dBAB de{a}fe | dcBc [EA]2 (3ABc | d2 (3ABc de{a}fe | 
 dBAB eafe | dBAB de{a}fe | dcBc [EA]4 || f2- fa f2 f2 | edBd [ec]2 [ec]2 | f2 fa f2 f2 | 
 dcBc [EA]2 [EA]2 | f2 fa f2 f2 | edBd efge | defa afec | dcBc Ac (3.A.c.c ||  