#include<stdio.h>
#include<math.h>
int main()
{
    int x,y,temp;
    scanf("%d\n",&x);
    scanf("%d\n",&y);
    if(x<0&&y<0)
    {
        printf("Invalid Input")
    }
    temp=x;
    x=y;
    y=temp;
  printf("%d\n",x);
 printf("%d\n",y);
  return 0;
}