Build harmonic accompaniment for the existing melody.
(D | G>)(B d>)(c"^(D7)" B/c/)B/A/ | G>B dB/d/ g2 | f>(e d)c"^(D7)" B(A/B/) |1,3 
 (c/d/)c/B/ (BA) A :|2,4 (c/B/)A/^F/ G3 :: (A | B>)(c B)A/B/ g>g | 
 ff/d/{d} ee cc | F2- F=E/F/ f>(f | e)d/c/ d3 (A | 
 B)c/B/ (AG/)^F/ G>A | BA/G/ (^F/G/)A [AD]>(g | ^f){f}g d>(c A)A/c/ | 
 (B/A/)G/^F/ G3 :|  
X:1
L:1/8
M:3/4
K:Gmin
 (D |"Gm" G>)(B d>)(c"^(D7)" B/c/)B/A/ |"Gm" G>B dB/d/ g2 |"Bb" f>(e d)c"^(D7)" B(A/B/) |1,3 
"D7" (c/d/)c/B/ (BA) A :|2,4"D7" (c/B/)A/^F/"Gm" G3 :: (A |"Bb" B>)(c B)A/B/"Eb" g>g | 
"Bb" ff/d/"Cm"{d} ee cc |"F7" F2- F=E/F/ f>(f | e)d/c/"D7" d3 (A | 
"Gm" B)c/B/"D7" (AG/)^F/"Gm" G>A | BA/G/"D7" (^F/G/)A [AD]>(g |"Gm" ^f){f}g d>(c"D7" A)A/c/ | 
 (B/A/)G/^F/"Gm" G3 :|  