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:C
['d2 d', 'FDF ABA']  
X:1
L:1/8
M:4/4
K:C
[M:6/8][K:D] .abc (3A/B/c/ | d2 d ded |{d} cBA ABc | d2 d de_f | ecA A2 B/A/ | d2 d ded | 
{d} cBA ABc | dB/c/d =cBA | GEE E2 :: (A/G/) | FDF ABA | FDF ABA | ECE GAG | ECE GAG | FDF ABA | 
 FDF ABc | d(B/c/d) =cBA | GED D2 :|  