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
['', 'cAFA BA (3Bcd cAFA EAAB cAca gedB', 'gfed cdef edcB']  
X:1
L:1/8
M:4/4
K:Amix
 AB |: cAFA BA (3Bcd | cAFA EAAB | cAca gedB | cedB cAAB | cAFA BA (3Bcd | cAFA EAAB | cAca gedB |1 
 cedB (3cdc AB :|2 cedB cAcd |: efga gdBd | gfga gfed | cdef edcB | AEAB cBcd | efga gdBd | 
 gfga gfed | cdef edcB |1 Aage aAcd :|2 Aage a2 ||  