Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:6/8
K:D
['DFA AFA', 'ecA BdB AFD']  
X:1
L:1/8
M:6/8
K:D
 DFA AFA | BdB AFD | DFA AFA | B2 c d2 z | DFA AFA | BdB AFD | dfd ecA | B2 c d2 z |] dfd ecA | 
 BdB AFD | faf ecA | B2 c d2 z | faf ecA | BdB AFD | DFA AFA | B2 c d2 z |]  