Create a series of chord progressions to improve the harmonic structure of the given music piece.
|: A4 c3 d e4 | a2 e2 fedc B4 | ABcd efed cdcB | 
 AcBc dcBA ^G2 E2 | ABAB cdcd e4 | a2 e2 fedc B4 | 
 ABcd ecAc fdBd | ecAc BA^GB A4 :| |: c4 e3 f g4 | cdef gece gedc | 
 Bcde fdBd fdcB | ABcd ecAc e2 dc | BcBc dcBA ^G2 E2 | c4 e3 f g4 | 
 agfe fedc B2 ^g2 | a4 e3 d c4 | fedc BcB>A A4 :|  
X:1
L:1/8
M:3/2
K:Amin
"A" |:"Am" A4 c3 d e4 |"Am" a2 e2"Dm" fedc"E" B4 |"Am" ABcd efed cdcB | 
"Am" AcBc"Dm" dcBA"E" ^G2 E2 |"Am" ABAB"Dm" cdcd"E" e4 |"Am" a2 e2"Dm" fedc"E" B4 | 
"Am" ABcd ecAc"Dm" fdBd |"Am" ecAc"E" BA^GB"Am" A4 :|"B" |:"C" c4 e3 f g4 |"C" cdef gece gedc | 
"G" Bcde fdBd fdcB |"Am" ABcd ecAc e2 dc |"F" BcBc"Dm" dcBA"E" ^G2 E2 |"C" c4 e3 f g4 | 
"F" agfe"Dm" fedc"E" B2 ^g2 |"Am" a4 e3 d c4 |"Dm" fedc"E" BcB>A"Am" A4 :|  