Develop chord structures to complement and enrich the harmony of the allotted musical excerpt.
cd | e2 ef edcB | AB (3cBA d4 | c2 cA"^(F#m)" B2{cB} Ac | BAGF E2 cd | 
 e2 ef edcB | AB (3cBA d4 | cBAc BA G2 | A6 :: G2 | F4 B4 | F2 AB- BA F2 | 
 A2 cA BcAB | cABc- cB A2 | F4 B4 | F2 AB- Bfed | cdec BA G2 | A4 A2 :|  
X:1
L:1/8
M:4/4
K:A
 cd |"A" e2 ef edcB | AB (3cBA"D" d4 |"A" c2 cA"^(F#m)" B2{cB} Ac |"B7" BAGF"E" E2 cd | 
"A" e2 ef edcB | AB (3cBA"D" d4 |"A" cBAc"E7" BA G2 |"A" A6 :: G2 |"Bm" F4 B4 | F2 AB- BA F2 | 
"A" A2 cA BcAB | cABc- cB A2 |"Bm" F4 B4 | F2 AB- Bfed |"D" cdec"E" BA G2 |"A" A4 A2 :|  