Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:4/4
K:Dmin
['dfed cAGE', 'defg afgf ec c2 acgc']  
X:1
L:1/8
M:4/4
K:Dmin
 dfed cAGE | F2 EF DEFD | B,CDE FGAd | cAGc Addc | dfed cAGE | FDEF DEFD | B,CDE FGAB | 
 A2 ag fddc :: defg afgf | ec c2 acgc | defg afge | fedc Addc | defg afgf | ec c2 acgc | 
 afge fedc | A2 ag fddc :|  