Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/8
M:2/2
K:Bb
['DC B,DFB dFED', 'B2 g>a bfdf Bdfb fdBd bfdB ecge']  
X:1
L:1/8
M:2/2
K:Bb
 DC | B,DFB dFED | CEAc eGFE | DB,FD BFdB | A>B c2 c2 DC | B,DFB dFED | CEGc eGFE | DFEG Fgfe | 
 d2{c} B>A B2 :: g>a | bfdf Bdfb | fdBd bfdB | ecge dBfd | e2{d} c>B c2 (3edc | BGFE DFBd | 
 cAGF EGce | (3gab Bd cAFe | d2{c} B>A B2 :|  