Construct congruent chords that enhance the existing musical piece.
fcfa fcfg | agfe f2 AB | c2 cd c2 cB | ABGA F2 c2 | fcfa fcfa | g2 g2 g2 ag | 
 fedc =BcdB | c2 e2 c2 c2 :: fefg agfe | d2 B2 B2 ef | g^fga bag=f | 
 e2 c2 c2 (3cde | fcfa fcfa | gcfb gcgb | agfa gfeg | f2 a2 f2 c2 :|  
X:1
L:1/8
M:2/2
K:F
"F" fcfa fcfg |"C" agfe"F" f2 AB |"C" c2 cd c2 cB | ABGA"F" F2 c2 |"F" fcfa fcfa |"C" g2 g2 g2 ag | 
"G" fedc"G7" =BcdB |"C" c2 e2 c2 c2 ::"F" fefg agfe |"Bb" d2 B2 B2 ef |"G" g^fga bag=f | 
"C" e2 c2 c2 (3cde |"F" fcfa fcfa |"C" gcfb gcgb |"F" agfa"C" gfeg |"F" f2 a2 f2 c2 :|  