Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:6/8
K:G
['DED GAB', 'z dBd efg fed cBA GFG Bcd']  
X:1
L:1/8
M:6/8
K:G
 DED GAB | AGA BGE | DED GAB | AdB AGE | DED GAB | AGA Bcd | ege dBG | DEF G2 z :| | dBd efg | 
 fed cBA | GFG Bcd | efg a2 (e/f/) | gbg{b} afd | (e>gf/e/) dBG | ege dBG | DEF G2 z :|  