Construct a musical work that combines the specified alphabet-based pattern with the given melodic theme.
X:1
L:1/8
Q:1/2=75
M:2/2
K:Bb
['(FG/A/) B2 d2 d2 cB A2 c2', 'B2 (de/f/) g2 eg egeg f2 df']  
X:1
L:1/8
Q:1/2=75
M:2/2
K:Bb
 (FG/A/) | B2 d2 d2 cB | A2 c2 c2 BA | GABc defd | gecB BAGF | E2 e2 e2 FE | D2 d2 defg | 
 fdBd ecAc | B2 B2 B2 :: (de/f/) | g2 eg egeg | f2 df dfdf | e2 ce cece | fedc BAGF | E2 g2 g2 FE | 
 D2 f2 fgab | fdBd ecAc | B2 B2 B2 :|  