Construct a musical work that combines the specified alphabet-based pattern with the given melodic theme.
X:1
L:1/8
M:4/4
K:Bb
['F B2 d>f b>f d<f g>a f>d', 'b2 b>a b>f d<f']  
X:1
L:1/8
M:4/4
K:Bb
 F |:"Bb" B2 d>f b>f d<f |"Eb" g>a b>g"Bb" f>d B<d |"Eb" e>f g>e"Bb" d>e f>d |1 
"C7" c>d c>B"F" A<F G>A :|2"F7" c>B c>e"Bb" d<B B |: f |"Bb" b2 b>a b>f d<f | b2 b>a b>f d<f | 
"Eb" e>f g>e"Bb" d>e f>d |1"C7" c>d c>B"F" A<c c :|2"F7" c>B c>e"Bb" d<B B |]  