   From  :    To
         :   3700000   3400000   2700000   2300000   1800000 
  3700000:         0        25        25        21        53 
  3400000:        34         0       376       173        91 
  2700000:        20       363         0       330       231 
  2300000:        16       167       315         0       590 
  1800000:        53       119       228       564         0 
