#include <stdio.h>

int main(){
    
    int num1,num2,n1,n2;
    if(num1<0 || num2<0){
        printf("Invalid Input");
        return 0;
    }
    int swap(&n1,&n2){
        *n1=(*n1+*n2)-(*n2=*n1);
    }
    *n1=&num1;
    *n2=&num2;
    scanf("%d\n%d",&num1,&num2);
    swap(&num1,&num2);
    printf("%d\n%d",num1,num2);
    return 0;
}