Construct a musical work that combines the specified alphabet-based pattern with the given melodic theme.
X:1
L:1/8
Q:1/2=100
M:2/4
K:Bb
['Bc d2 Bd f2 df b2 f2', 'B2 dc BABG d2 Bc dcde f2']  
X:1
L:1/8
Q:1/2=100
M:2/4
K:Bb
 Bc | d2 Bd | f2 df | b2 f2 | f2 g2 | f2 ed | edcB | AB c2 | c2 Bc | d2 Bd | f2 df | b2 f2 | f3 g | 
 f2 ed | edcB | F2 B2 | B2 :: dc | BABG | d2 Bc | dcde | f2 de | f3 g | fdcB | AB c2 | c2 ga | 
 bagf | b2 ag | fdcB | G2 FE | DF B2 | Gc e2 | !wedge!d2 !wedge!B2 | !wedge!B2 :|  