Create a set of chord combinations that enhance the harmony of the submitted musical composition.
"^Intro" .e.e/.e/ .e.e .e z .e z |: ec dB cA AA | BG GG cA AA | 
 ec dB cA AA | ee e/f/g aa a z :| |: ag f2 ed c2 | BB/c/ dB AB c2 | 
 ag f2 ed c2 | e/e/e fg aa a z :|  
X:1
L:1/8
M:4/4
K:A
"^Intro" .e.e/.e/ .e.e .e z .e z |:"A" ec"E" dB"A" cA AA |"E" BG GG"A" cA AA | 
"A" ec"E" dB"A" cA AA |"E" ee e/f/g aa a z :| |:"D" ag f2"A" ed c2 |"E" BB/c/ dB"A" AB c2 | 
"D" ag f2"A" ed c2 |"E" e/e/e fg"A" aa a z :|  