Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:4/4
K:Amix
['A,2 CA,', 'z efed cdef ea{b}a^g a2 ef =gfed']  
X:1
L:1/8
M:4/4
K:Amix
 A,2 CA, EA,CA, | G,2 B,G, DG, B,G, | A,2 CA, EA, CA, |1 B,A,G,B, A,2 A,B, :|2 B,A,G,B, A,2 z2 || 
 efed cdef | gedc BG G z | efed cdef | ea{b}a^g a2 ef | =gfed cdef | gedc BGAB | (3=cBA BG AGEF | 
 GFED B,A, A,2 ||  