ista ich gain
   1   0  21.56
   1   1  21.83
   1   2  21.48
   1   3  21.85
   1   4  21.50
   1   5  21.79
   1   6  21.49
   1   7  21.79
   1   8  21.43
   1   9  21.76
   1  10  21.45
   1  11  21.74
   1  12  21.39
   1  13  21.85
   1  14  21.40
   1  15  21.78
   1  16  21.44
   1  17  21.70
   1  18  21.48
   1  19  21.76
   1  20  21.48
   1  21  21.81
   1  22  21.44
   1  23  21.79
   1  24  102872.91
   1  25  21.73
   1  26  21.47
   1  27  21.84
   1  28  21.50
   1  29  436454.12
   1  30  21.47
   1  31  21.64
   2   0  21.56
   2   1  21.79
   2   2  21.68
   2   3  21.72
   2   4  21.53
   2   5  21.86
   2   6  21.56
   2   7  21.74
   2   8  21.60
   2   9  21.77
   2  10  21.59
   2  11  21.64
   2  12  21.56
   2  13  21.73
   2  14  21.52
   2  15  21.70
   2  16  21.46
   2  17  21.76
   2  18  21.49
   2  19  21.74
   2  20  21.48
   2  21  21.70
   2  22  21.53
   2  23  33.52
   2  24  21.46
   2  25  21.73
   2  26  21.58
   2  27  167408.90
   2  28  21.50
   2  29  21.66
   2  30  21.61
   2  31  21.69
ista type  n gain --- averages:
   1 even 15 21.46
   1 odd  15 21.78
   2 even 16 21.54
   2 odd  15 22.52