Generate harmonious tunes by incorporating the specified letter-based framework and the presented motif.
X:1
L:1/4
M:3/4
K:C
['G c', 'd/ c']  
X:1
L:1/4
M:3/4
K:C
"C" E2 G |"F" F2 A |"C" G3 | E G c |"G7" B3 | F B d |"C" c3/2 B/ c | G2 z | E2 G |"F" F2 A | 
"C" G3 | E G c |"G" B2 d |"D7" A2 B |"G" G3/2 G/ G | G z z |:"F" A3/2 f/ f | f2 A |"C" G3/2 e/ e | 
 e d c |1"G7" B2 F | B2 A |"C" A G c | E3 :|2"G7" B2 A | G2 B |"C" c z"G7" B |[K:F]"C" c z z |: 
"F" A3 | c A c | f3 | A3 |"C7" G3/2 d/ c |1 B2 E |"F" F3/2 d/ c | A2 z :|2"C7" B A G |"F" (F3 | 
 F) z z |]  