20
 260.0        45
 280.0        45
 300.0        45
 320.0        45
 340.0        45
 360.0        45
 380.0        45
 400.0        45
 420.0        45
 440.0        45
 460.0        45
 480.0        45
 500.0        45
 520.0        45
 540.0        45
 560.0        45
 580.0        45
 600.0        45
 620.0        45
 640.0        45