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:9/8
K:G
['f g2', 'G Bcd dec (dB).G']  
X:1
L:1/8
M:9/8
K:G
 f | g2 d BGB BGB | g2 (d B)GB TA2 f | g2 e BGB BGB | cAc BGB A2 :: G | Bcd dec (dB).G | 
 (B/A/B/c/d) edB TA2 G | Bcd dec (dB).G | cAc BGB A2 :|  