Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/8
M:6/8
K:C
['F z E/F/']  
X:1
L:1/8
M:6/8
K:C
"^(a)" E/F/ | Gcc c2 d | cGF G2 z |"^(b)" G<cd e2 c/d/ | c<GG/F/ G z e/d/ | c>EE/E/ F z E/F/ | 
 G>AG F z E/F/ | G>FG AGF | G<ED C2 |]  