Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
Q:1/2=80
M:4/4
K:G
['cB{B} A2 GF GB dg', 'd4 (d/4e/4)f3/2 ed ecac (c/4d/4)e3/2 dc dBgB']  
X:1
L:1/8
Q:1/2=80
M:4/4
K:G
 (B/4c/4)d3/2 cB{B} A2 GF | GB dg Tg2 f2 | gdcB ecBA | dBAG (F/4G/4A3/2) A2 | 
 (B/4c/4d3/2) cB{B} A2 GF | GB dg (f/4g/4)a3/2 a2 | bgfe afed | A2 T^c2 d4 :: 
 (d/4e/4)f3/2 ed ecac | (c/4d/4)e3/2 dc dBgB | (B/4c/4)d3/2 cB ADcA | BGdB TB2 A2 | 
 (B/4c/4)d3/2 cB{B} A2 GF | GB dg Te2 d2 | ecBA dBAG | D2 TF2 G4 :|  