Construct a compatible series of chord changes that support the given music piece.
gg !>!g2 | ee !>!e2 | ce a>g | g2 f2 | ff f>e | dd d>c | Bd a>g | c2 c2 :|  
X:1
L:1/8
M:2/4
K:C
"C" gg !>!g2 | ee !>!e2 | ce a>g |"G7" g2 f2 | ff f>e | dd d>c | Bd a>g |"C" c2 c2 :|  