ista ich gain
   1   0  21.94
   1   1  22.25
   1   2  21.80
   1   3  22.17
   1   4  21.86
   1   5  22.19
   1   6  21.85
   1   7  22.13
   1   8  21.82
   1   9  22.18
   1  10  21.82
   1  11  22.16
   1  12  21.79
   1  13  22.23
   1  14  21.68
   1  15  22.13
   1  16  21.73
   1  17  22.04
   1  18  21.82
   1  19  22.10
   1  20  21.81
   1  21  22.19
   1  22  21.84
   1  23  22.10
   1  24  21.77
   1  25  22.18
   1  26  21.77
   1  27  22.16
   1  28  21.79
   1  29  22.86
   1  30  21.88
   1  31  22.00
   2   0  22.09
   2   1  22.25
   2   2  22.06
   2   3  22.22
   2   4  22.01
   2   5  22.25
   2   6  22.05
   2   7  22.17
   2   8  22.00
   2   9  22.20
   2  10  21.99
   2  11  22.19
   2  12  21.97
   2  13  22.13
   2  14  21.89
   2  15  22.16
   2  16  21.91
   2  17  22.15
   2  18  21.90
   2  19  22.14
   2  20  21.89
   2  21  22.16
   2  22  21.92
   2  23  22.16
   2  24  21.97
   2  25  22.08
   2  26  21.98
   2  27  22.11
   2  28  21.96
   2  29  22.16
   2  30  22.00
   2  31  22.11
ista type  n gain --- averages:
   1 even 16 21.81
   1 odd  16 22.19
   2 even 16 21.97
   2 odd  16 22.17