Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:2/4
K:A
['ce aa', 'c2 c>B ce fe']  
X:1
L:1/8
M:2/4
K:A
 AA ce | aa fe | A>A ce | aa f2 | AA ce | aa fe | ff ef | z EF A2 :| c2 c>B | ce fe | c2 ce | 
 (3(cBA) B2 | c2 c>B | ce fe | f/g/a/g/ e>c | (3(cBA) A2 :|  