Construct harmonious chords that enhance the provided tune.
d2 c BGB BGB | d2 c BGB cBA | d2 c BGB BGB | cBc A2 B cBA :: GBd gdB gdB | 
 GBd gdB cBA | GBd gag gdB | cBc A2 B cBA :|  
X:1
L:1/8
M:9/8
K:G
"G" d2 c BGB BGB |"G" d2 c BGB"D" cBA |"G" d2 c BGB BGB |"C" cBc A2 B"D" cBA ::"G" GBd gdB gdB | 
 GBd gdB"D" cBA |"G" GBd gag gdB |"C" cBc A2 B"D" cBA :|  