Produce pleasing melodies that correspond with the indicated letter notation and incorporate the suggested theme.
X:1
L:1/4
M:3/4
K:Bb
['d c']  
X:1
L:1/4
M:3/4
K:Bb
 B d c | d B z | B d c | d B z | B d f | f e z | e d c | c B z | B d c | d B z | B d c | d B z | 
 B d f | f e z | e d c | c B z | f g/f/e/d/ | e2 z | e f/e/d/c/ | d2 z | d e/d/c/B/ | c2 z | 
 f d c | B2 z |]  