Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
Q:1/8=180
M:12/8
K:G
['d2 B', 'e e2']  
X:1
L:1/8
Q:1/8=180
M:12/8
K:G
 g/f/ | edB d2 B d2 B B2 g | edB d2 B c2 A A2 G | edB d2 B BAB gfg | BAB ged B2 G G2 :| e | 
 gfg eaf g2 e e2 d | e2 a aga b2 e e2 f | gbg faf g2 e e2 d | BAB ged B2 G G2 :|  