comb: |S| = 9720
   k=0   : increment of Re G = +0.2773
   k=1   : increment of Re G = +0.2761
   k=2   : increment of Re G = +0.2727
   k=3   : increment of Re G = +0.2671
   k=5   : increment of Re G = +0.2495
   k=0.5 : increment of Re G = -0.0118
   k=1.5 : increment of Re G = -0.0117
   k=2.5 : increment of Re G = -0.0116
plain: |S| = 6016
   k=0   : increment of Re G = +0.1706
   k=1   : increment of Re G = +0.0005
   k=2   : increment of Re G = -0.0020
   k=3   : increment of Re G = +0.0027
   k=5   : increment of Re G = -0.0009
   k=0.5 : increment of Re G = -0.0084
   k=1.5 : increment of Re G = -0.0000
   k=2.5 : increment of Re G = +0.0006
