Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:6/8
K:D
['ded cde dAG', 'f g2 e f2 d cde gfe']  
X:1
L:1/8
M:6/8
K:D
|: ded cde | dAG FED | ded cde | dAG F2 A | G2 B BAG | FGA d2 A |1 Bcd efd | cde ABc :|2 Bcd efe | 
 d3 d2 c |: dAG FED | def a2 f | g2 e f2 d | cde gfe | dAG FED | GBd g3 | fdB cde | de/d/c d2 e :|  