Construct a harmonic backdrop to enhance the provided melody.
e2 | a2ab{ab} a2gf | e2ef ecAc | cBBc dBGB |1,3 AECE ABce :|2,4 A6 :: ce | 
 [ac]4{ga} gegb | abaf dfaf | Tf2e2 eaec | A6 c2 | Tc2B2 BdBG | 
 E2GB dBGB |1,3 AGAB cBcd |"^(E7)" efed cA :|2,4 A4{GA} GEGB | [AC]6 :|  
X:1
L:1/16
M:2/4
K:A
 e2 |"A" a2ab"D"{ab} a2gf |"A" e2ef ecAc |"E7" cBBc dBGB |1,3"A" AECE ABce :|2,4"A" A6 :: ce | 
"A" [ac]4"E7"{ga} gegb |"D" abaf dfaf |"A" Tf2e2 eaec |"A" A6 c2 |"E7" Tc2B2 BdBG | 
"E7" E2GB dBGB |1,3"A" AGAB cBcd |"^(E7)" efed"A" cA :|2,4"A" A4"E7"{GA} GEGB |"A" [AC]6 :|  