Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:4/4
K:G
['B2 GB EBGB', 'g2{a} gf{a} gfed B2']  
X:1
L:1/8
M:4/4
K:G
 B2 GB EBGB | A2 FA DAFA | B2 GB EBGB | (3Bcd ef{a} gfed | B2 GB EBGB | A2 FA DAFA | BAGF EFGA | 
 (3Bcd ed (3Bcd ef || g2{a} gf{a} gfed | B2 BA (3Bcdef | g2{a} gf{a} gfed | B2 Ac B E3 | 
 g3 f{a} ge fd | B3 A G3 F | E3 F G3 A | (3Bcd ef{a} gfed ||  