Devise a harmonic structure to support the present melody.
A |: .d.c .d.f | (ba) (^de) | (gf) .c.d | (fe) .c.A | dc df | (ba) (^de) | 
 fd/f/ ac |1 d2 z A :|2 d2 z a |: ga gf | e2 ce | de dc | B2 Ga | ga gf | 
 ed cB | Af dB |1 c2 z a :|2 c2 z A |: df ef/e/ | df ef/e/ | de fg | 
 eb/a/ ge | df ef/e/ | df ef/e/ | db/a/ ge |1 d2 z A :|2 d2 z2 |]  
X:1
L:1/8
M:2/4
K:D
 A |:"D" .d.c .d.f | (ba) (^de) | (gf) .c.d |"A7" (fe) .c.A |"D" dc df | (ba)"A7" (^de) | 
"D" fd/f/ ac |1"D" d2 z A :|2"D" d2 z a |:"A7" ga gf | e2 ce |"D" de dc |"Em" B2 Ga |"A7" ga gf | 
 ed cB |"D" Af dB |1"A7" c2 z a :|2"A7" c2 z A |:"D" df"A7" ef/e/ |"D" df"A7" ef/e/ |"D" de fg | 
"A7" eb/a/ ge |"D" df"A7" ef/e/ |"D" df"A7" ef/e/ |"D" db/a/"A7" ge |1"D" d2 z A :|2"D" d2 z2 |]  