Design chord combinations to enhance the harmony of the given musical composition.
a2 g | f2 A e2 A | ded cBA | d2 A e2 A | f3 a2 g | fee egf | 
 edd d2 f |1 edc BA^G | A3 :|2 agf edc | d3 |: c2 d | eAA cAA | 
 eAd cBA | dAd eAe | f3 fef | gba gfe | fag fed |1 efd ceB | A2 B :|2 
 egf edc | d3 |]  
X:1
L:1/8
M:2/2
K:D
"A7" a2 g |"D" f2 A"A7" e2 A |"Bm" ded"A7" cBA |"G" d2 A"A7" e2 A |"D" f3 a2 g |"A7" fee egf | 
"D" edd d2 f |1"E7" edc BA^G |"A" A3 :|2"E7" agf"A7" edc |"D" d3 |:"A7" c2 d |"A7" eAA cAA | 
 eAd cBA |"G" dAd"A7" eAe |"D" f3 fef |"G" gba gfe |"D" fag fed |1"E7" efd ceB |"A" A2 B :|2 
"Em" egf"A7" edc |"D" d3 |]  