Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
Q:1/8=100
M:6/8
K:Bb
['(c3/2 B/) c']  
X:1
L:1/8
Q:1/8=100
M:6/8
K:Bb
 F | B2 B (c3/2 B/) c | (d f) d (c B) c | (d3/2 c/) B (B/ G3/2) F | (F G) B c2 (d/ c/) | 
 B2 B (c3/2 B/) c | (d f) d (c B) c | (d3/2 c/) B (B/ G3/2) F | (F G) B B2 d2 | f2 g (f d) B | 
 f2 g (f d) B | (f d) B (f d) B | (g3/2 f/) d c2 (d/ c/) | B2 B (c3/2 B/) c | (d f) d (c3/2 B/) c | 
 (d3/2 c/) B (B/ G3/2) F | (F G) B{Bc} B2 |]  