Construct congruent chords that enhance the existing musical piece.
K:G] Bd !>!d2 | GB !>!B2 | BB/B/ AG | FA A2 | ce !>!e2 | df !>!f2 | df/e/ de/f/ | 
 g2 z2 ::[K:C] c'g g/f/e | c'g g/f/e | d/e/f/g/ ba | ag g2 | c'g g/f/e | c'g g/f/e | 
 d/e/f/g/ ab | c'3 z ::[K:F] cc c>B | AA A>G | FF d>c | c2 B2 | BB/B/ B>A | GG G>F |1 
 EG c>B | B2 A2 :|2 EG c>e | f3 z |  
X:1
L:1/8
M:2/4
K:none
[K:G]"G" Bd !>!d2 | GB !>!B2 | BB/B/ AG |"D7" FA A2 | ce !>!e2 | df !>!f2 | df/e/ de/f/ | 
"G" g2 z2 ::[K:C]"C" c'g g/f/e | c'g g/f/e |"G7" d/e/f/g/ ba |"C" ag g2 | c'g g/f/e | c'g g/f/e | 
"G7" d/e/f/g/ ab |"C" c'3 z ::[K:F]"F" cc c>B | AA A>G | FF d>c |"C7" c2 B2 | BB/B/ B>A | GG G>F |1 
 EG c>B |"F" B2 A2 :|2 EG c>e |"F" f3 z |]  