A B C D duration
  0 0 0 0   21.60
  0 0 0 1   11.54
  0 0 0 2   19.09
  0 0 0 3   13.11
  0 0 1 0   21.60
  0 0 1 1   11.50
  0 0 1 2   21.08
  0 0 1 3   11.72
  0 1 0 0   21.09
  0 1 0 1   11.14
  0 1 0 2   21.31
  0 1 0 3   11.26
  0 1 1 0   22.17
  0 1 1 1   11.32
  0 1 1 2   20.44
  0 1 1 3   12.82
  1 0 0 0   21.60
  1 0 0 1   11.75
  1 0 0 2   19.50
  1 0 0 3   13.72
  1 0 1 0   21.86
  1 0 1 1    9.82
  1 0 1 2   21.66
  1 0 1 3   13.03
  1 1 0 0   19.57
  1 1 0 1   11.69
  1 1 0 2   20.11
  1 1 0 3   12.09
  1 1 1 0   21.86
  1 1 1 1   11.18
  1 1 1 2   20.24
  1 1 1 3   12.29