Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/8
M:12/8
K:C
['BGA EGD E3', 'D GFG B2 d e/f/ge', 'B GFG Bcd e3 g3 GFG Bdd', 'A BGA EGD E3 DEF GAB']  
X:1
L:1/8
M:12/8
K:C
[K:G] bee!p! a f a uade a e!p![Q:1/8=180]"^Part A" .A | BGA EGD E3 DEG | BGA EFD c3 B2 A | 
 BGA EGD E3 DEF | GAB GBA G3 G2 :|"^Part B" D |: GFG B2 d e/f/ge d2 B | GFG Bcd e3 g3 | 
 GFG Bdd e/f/ge d2 B | BAG EDE c3 B2 A :|"^Part A repeat" BGA EGD E3 DEG | BGA EFD c3 B2 A | 
 BGA EGD E3 DEF | GAB GBA !fermata!G6 |]  