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
Q:3/4=40
M:3/4
K:C
['B2 B2', 'c2 c2']  
X:1
L:1/8
Q:3/4=40
M:3/4
K:C
 C |[K:Bb] Pefxed aS (3.MFGA | B2 B2 B2 | B4 df | fedcBA | B2 B,2"^s-q in ms""_p" (BA) | G2 F2 B2 | 
 E2 D2 B2 | ABcded | d2 c2"^s-q in ms""_f" de | f2 f2 f2 |"^tr" f^g/4a/4 gfed | e2 e2 e2 | 
"^tr" ef/4g/4 fedc | dBfdbf | f2 ecAc | [BD]2 [BD]2 [BD]2 | [BD]4 :: (AB) | c2 c2 d2 | dcBAGF | 
 c2 c2 d2 | e4 (Bc) | d2 d2 e2 | edcBAG | c/d/e/c/ B2"^tr" A2 | G4 (F/E/D/E/) | F2 B2 B2 | 
 B2 ABcd | e2 e2 d2 | d2 c2"_p" de | f>gfdbg | f>gfdbg | (f/g/f/e/) d2 c2 |"^tr" c2 B2 :|  