   From  :    To
         :   3700000   3400000   2700000   2300000   1800000 
  3700000:         0        26        22        12        25 
  3400000:        33         0       380       150        81 
  2700000:        16       363         0       249       231 
  2300000:        15       159       265         0       608 
  1800000:        20        96       192       636         0 
