Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
Q:3/4=50
M:3/4
K:C
['G2 c2']  
X:1
L:1/8
Q:3/4=50
M:3/4
K:C
 G2 | c2 G2 c2 | e4 dc | d2 G2 d2 | f4 ed | e2 cdef | g2 fedc | dB G2 F2 | F2 E2 G2 | c2 e2 dc | 
{e} d2 cBAG | c3 edc |{c} B4 GG | AB c2 BA | Bc d2 e^f | g2 dcBA | G4 dd | d2 cBAG | d3 e f2 | 
 e2 dcBA | e4 e2 | a2 edcB | cBABcA | defedc | BAGABG | cBcdef | g3 f e2 | f2 e2 d2 | c4 |]  