Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:2/4
K:Bb
['', 'B/B/B/B/ dd']  
X:1
L:1/8
M:2/4
K:Bb
"A" |:"Bb" B/B/B/F/ dd | d/d/d/B/ f2 |"F7" e/e/A e/e/A |1 c/B/A/G/ F2 :|2"Bb" BB !fermata!B2 |] 
[K:F]"B" |:"C7" ag b>g |"F" gf a>f |"C7" fe ge |1"F" fa c'2 :|2"F" ff f2 |][K:Bb]"C" |] 
"Bb" B/B/B/B/ dd |"F7" cc e2 | A/A/A/A/ cc |"Bb" Bd F2 |"Bb" B/B/B/B/ dd |"Eb" ee g2 | 
"F7" f/f/f/f/ ec |"Bb" Bd B2 |][K:Eb]"D" |:"Eb" E2 G2 |"Ab" A2"Bb7" B2 |"Ab" c2"Bb7" d2 |1 
"Eb" eB"Bb" AF :|2"Eb" ee"^da Capo" e2 |]  