Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/4
Q:3/4=100
M:6/4
K:Gmin
['a b', 'f d']  
X:1
L:1/4
Q:3/4=100
M:6/4
K:Gmin
 d | g3/2 a/ ^f g2 d | g a b a2 a | b f d g d B | B3/2 A/ G G2 d | g3/2 a/ ^f g2 d | g a b a2 a | 
 b =e (f/d/) ^c3/2 =B/ A | d =e ^c d2 :: f | =e3/2 d/ e f2 f | d f a b2 b | b f d g2 g | 
 =e3/2 d/ e f2 f | f g a b f d | e f g f d B | d e f g d e | d3/2 c/ B B2 (d/e/) | 
 f3/2 e/(d/c/) B3/2 c/ d | e3/2 f/ (e/d/) c3/2 d/ e | d g f g d B | B3/2 A/ G G2 :|  