Devise a harmonic structure to support the present melody.
|: FA A2 BAFA | dfed BcdA | FA A2 BAFA | dfed B2 A2 | FA A2 BAFA | 
 dfed Bdef | g3 e f3 e | dfed B2 A2 :: f2 af bfaf | gfed Bcde | 
 f2 af bfaf | gfed B2 A2 | f2 af bfaf | gfed Bdef | g3 e f3 e | 
 dfed B2 A2 :|  
X:1
L:1/8
M:2/2
K:D
|:"D" FA A2 BAFA | dfed"G" Bc"A7"dA |"D" FA A2 BAFA | dfed"G" B2"A7" A2 |"D" FA A2 BAFA | 
 dfed"G" Bdef |"Em" g3 e"D" f3 e | dfed"G" B2"A7" A2 ::"D" f2 af bfaf |"G" gfed Bcde | 
"D" f2 af bfaf |"Em" gfed"G" B2"A7" A2 |"D" f2 af bfaf |"G" gfed Bdef |"Em" g3 e"D" f3 e | 
 dfed"G" B2"A7" A2 :|  