Create a set of chord combinations that enhance the harmony of the submitted musical composition.
|: fg | afaf d2 ef | gege c2 ef | gfed cABc | defg a2 fg | afaf d2 ef | 
 gege c2 ef | gfed cABc | dfec d2 :: AG | FAdA FAdA | GBdB GBdB | 
 ABcd efec | defg a2 AG | FAdA FAdA | GBdB GBdB | ABcd efec | 
 df ec d2 :|  
X:1
L:1/8
Q:1/8=300
M:2/2
K:D
|: fg |"D" afaf d2 ef |"A7" gege c2 ef | gfed cABc |"D" defg a2 fg |"D" afaf d2 ef | 
"A7" gege c2 ef | gfed cABc |"D" df"A7"ec"D" d2 :: AG |"D" FAdA FAdA |"G" GBdB GBdB | 
"A7" ABcd efec |"D" defg a2 AG |"D" FAdA FAdA |"G" GBdB GBdB |"A7" ABcd efec | 
"D" df"A7" ec"D" d2 :|  