   From  :    To
         :   2403000   2136000   1870000   1603000 
  2403000:         0    155836    245035     91251 
  2136000:    160082         0    953724    330194 
  1870000:    239126    947495         0   2913385 
  1603000:     92913    340669   2901248         0 
