Construct chordal sequences to boost the harmonious coherence within the specified musical piece.
|: AAcA eAfA | eAfA ecBc | AAcA eAfA |"^(E)" ecBc AFEF | AAcA eAfA | 
 eAfA ecBc | ABAF EFef |1 ecBc AAcB :|2 ecBc ecBc |: AA/B/ ce a3 f | 
 efed cdBc | AA/B/ ce a3 e | fbba gefg | a3 e fa ec | dcBA BAFG | 
 A3 F EFef |1 ecBc A3 E :|2 ecBc ecBc :|  
X:1
L:1/8
M:4/4
K:A
|:"A" AAcA eAfA | eAfA"E7" ecBc |"A" AAcA eAfA |"^(E)" ecBc"E7" AFEF |"A" AAcA eAfA | 
 eAfA"E7" ecBc |"A" ABAF EFef |1"E7" ecBc"A" AAcB :|2"E7" ecBc"A" ecBc |:"A" AA/B/ ce a3 f | 
"E7" efed cdBc |"A" AA/B/ ce a3 e |"Bm" fbba"E7" gefg |"A" a3 e fa ec |"Bm" dcBA"E7" BAFG | 
"A" A3 F EFef |1"E7" ecBc"A" A3 E :|2"E7" ecBc"A" ecBc :|  