Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:4/4
K:Cdor
['(3edc de fg eg fd fe', 'de fg eg']  
X:1
L:1/8
M:4/4
K:Cdor
[K:Cmin] (3edc de fg eg | fd fe c2 ce | (3edc de fg eg | fd fe c2 cg |: ga gf ef g2 | 
 (3gfe de fg eg | c2 de fg eg |1 fd fe c2 cg :|2 fd fe c2 c2 ||  