Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:4/4
K:C
['A,2 DE FEDC', 'acgc d2 Ad fgag egce d4 a3']  
X:1
L:1/8
M:4/4
K:C
 Ad d3 dcAd | c3 G EFGE | DA, A,2 FA, A,2 | FEDB, CA,G,C |1 A,2 DE FEDC | A,B,CE FGAc | 
 defg ag (3fga | gcec d4 :|2 A,2 DE FEDC | A,B,CG ABcg | ecde dcAG | cAGE D4 || 
[K:G] d2 Ad (3fga fg | ec c2 acgc | d2 Ad fgag | egce d4 | a3 b ag (3efg | fded (3cde Ad | 
 c3 d (3efg ed | cAGE D4 :|  