Create chord structures that will improve the harmony of the provided musical section.
af |: eA A2 | ABcd | eA A2 a2 af | eA A2 ABcd | efge d2 cd :| eaaf gfed | 
 eaaf g2 fg | eaaf gfed | efge d2 cd | eaaf gfed | eaaf g2 fg | 
 afge fdec | dB B2 g2 |]  
X:1
L:1/8
M:2/2
K:Amix
 af |:"A" eA A2 | ABcd | eA A2"D" a2 af |"A" eA A2 ABcd | efge"G" d2 cd :|"A" eaaf"G" gfed | 
"A" eaaf"G" g2 fg |"A" eaaf"G" gfed |"A" efge"G" d2 cd |"A" eaaf"G" gfed |"A" eaaf"G" g2 fg | 
"D" afge fdec |"G" dB B2 g2 |]  