Construct harmonious chord structures to elevate the given musical piece.
Bc | dgfe dcBA | GBDG B2 AG | FADF A2 GF | GBDG B2 Bc || dgfe dcBA | 
 GBDG B2 AG | FGAB cdef | g2 G2 G2 :: AG | FADF A2 GF | GBDG B2 AG | 
 FADF A2 GF | GDEF GABc || dgfe dcBA | GBDG B2 AG | FGAB cdef | 
 g2 G2 G2 :|  
X:1
L:1/8
M:4/4
K:G
 Bc |"G" dgfe"D7" dcBA |"G" GBDG B2 AG |"D7" FADF A2 GF |"G" GBDG B2 Bc ||"G" dgfe"D7" dcBA | 
"G" GBDG B2 AG |"D7" FGAB cdef |"G" g2 G2 G2 :: AG |"D7" FADF A2 GF |"G" GBDG B2 AG | 
"D7" FADF A2 GF |"G" GDEF"D7" GABc ||"G" dgfe"D7" dcBA |"G" GBDG B2 AG |"D7" FGAB cdef | 
"G" g2 G2 G2 :|  