// copy x,y points from stdin to stdout
//
#include <stdio.h>
#include <math.h>
  
typedef struct { double x, y; } Point; // a point in 2 dimensions
 
int main( void)
{
  int count;  Point p;
 
  while(1) // until scanf fails
  {
   // try to read a point
   //
    count = scanf( "%lf%lf", &p.x, &p.y);
 
   // if scanf didn't read 2 values, break out of the loop
   //
    if( count != 2) break;
 
    printf( "%g %g\n", p.x, p.y);
  }
 
  return 0;
}