Construct tunes that adhere to the specified chord alterations.
'D', 'G', 'D', 'Bm', 'D', 'G', 'D', 'G', 'D', 'Bm', 'Bm', 'D', 'Bm', 'A', 'Bm', 'D', 'G', 'D', 'Bm'  
X:1
L:1/8
M:6/8
K:D
 A/G/ |"D" FAA dAA |"G" BAB"D" dAG | FAA dfe |"Bm" dBB BAG |"D" FAA dAA |"G" BAB"D" def | 
"G" gfe"D" dfe |"Bm" dBB B2 :: g |"Bm" fbb faa |"D" fed deg |"Bm" fbb faa | fed"A" e2 g | 
"Bm" fbb faa |"D" fed def |"G" gfe"D" dfe |"Bm" dBB B2 :|  