/* @JUDGE_ID:  xxxxxxx  138  C  "by yatsen" */

#include <stdio.h>
#include <math.h>
main()
{ double n,dk;
  int Case=0;
  for (n=8;Case<10;n++)
  { 
	dk=sqrt(n/2*(n+1));
	
	if (dk==floor(dk))
	{
		Case++;
		
		printf("%10.0lf%10.0lf\n",dk,n);
		/* This line edited by PR
		   Originally it was:
		   printf("%10.0lf %10.0lf\n",dk,n); */
	}
  }
}