Construct congruent chords that enhance the existing musical piece.
| [ec] | [ec]2 [fd] [ec]2 [dB] | [dB] [cA]2- [cA]2 [BG] | [cA][dB][ec] [ec][dB][cA] | 
 [BG]3- [BG]2 [cA] | [BG]2 [cA] [dB]2 [cA] | [BG]3 [fd]2 [fd] | 
 [ec][fd][ec] [dB][cA][BG] | [cA]3- [cA]2 [cA] | [BG]2 [cA] [dB]2 [cA] | 
 [BG]3 [fd]2 [fd] | [ec][fd][ec] [dB][cA][BG] | [AE]3 | [cA]2 [ec] | 
 [dB]2 [dB] [BG][cA][dB] | [cA]2 [cA] [cA][dB][ec] | [dB]2 [dB] [BG][cA][dB] | 
 [cA]3- [cA]2 | [cA] | [cA][BG][cA] [ec][dB][cA] | [BG]3- [BG]2 | [cA] | 
 [BG]2 [cA] [dB]2 [cA] | [BG]3 [fd]3 | [ec][fd][ec] [dB][cA][BG] | 
 [cA]3- [cA]2 [cA] | [BG]2 [cA] [dB]2 [cA] | [BG]3 [fd]3 | 
 [ec][fd][ec] [dB][cA][BG] | [AE]3 z2 |]  
X:1
L:1/8
M:6/8
K:A
"A" | [ec] |"A" [ec]2 [fd] [ec]2 [dB] |"A" [dB] [cA]2- [cA]2 [BG] |"A" [cA][dB][ec] [ec][dB][cA] | 
"E7" [BG]3- [BG]2 [cA] |"E7" [BG]2 [cA] [dB]2 [cA] |"E7" [BG]3"D" [fd]2 [fd] | 
"E7" [ec][fd][ec] [dB][cA][BG] |"A" [cA]3- [cA]2 [cA] |"E7" [BG]2 [cA] [dB]2 [cA] | 
"E7" [BG]3"D" [fd]2 [fd] |"E7" [ec][fd][ec] [dB][cA][BG] |"A" [AE]3"B" | [cA]2 [ec] | 
"E7" [dB]2 [dB] [BG][cA][dB] |"A" [cA]2 [cA] [cA][dB][ec] |"E7" [dB]2 [dB] [BG][cA][dB] | 
"A" [cA]3- [cA]2"C" | [cA] |"A" [cA][BG][cA] [ec][dB][cA] |"E7" [BG]3- [BG]2"D" | [cA] | 
"E7" [BG]2 [cA] [dB]2 [cA] |"E7" [BG]3"D" [fd]3 |"E7" [ec][fd][ec] [dB][cA][BG] | 
"A" [cA]3- [cA]2 [cA] |"E7" [BG]2 [cA] [dB]2 [cA] |"E7" [BG]3"D" [fd]3 | 
"E7" [ec][fd][ec] [dB][cA][BG] |"A" [AE]3 z2 |]  