#include<stdio.h>

int swap(int *n1,int *n2){
    *n1=(*n1+*n2)-(*n2=*n1);
}
int main(){
    int n1,n2;
    if(!scanf("%d",&n1)){
        printf("Invalid Input");
        return 0;
    }
    if(!scanf("%d",&n2)){
        return 0;
    }
    swap(&n1,&n1)
    printf("%d",n1);
    printf("%d",n2);
}