#include<stdio.h>
void fun(int *a,int *b,int *temp){
    temp = a;
    a = b;
    b = temp;
}
int main(){
    int x,y;
    scanf("%d %d",&x,&y);
    if(!scanf("%d %d",&x,&y)){
        printf("Invalid Input");
        return 0;
    }
    fun(x,y);
    printf("%d %d",x,y);
}