#include<stdio.h>
int fun(){
    int  num1,num2;
    scanf("%d %d",&num1,&num2);
    if(num1<0 || num2<0){
        printf("Invalid Input");
        return 0;
    }
    int main(){
        fun(int n1,int n2)
    }
    n1 = (n1+n2) - (n2=n1);
    printf("%d \n%d",n1,n2);
    
}