#include <stdio.h>
int main()
{
    int a,b;
    scanf("%d %d",&a,&b);
    int c=a+b;
    int x=c%10;
    int y=(c-x)/10%10;
    if(y==0)
        printf("%d\n",x);
    else
        printf("%d%d\n",y,x);
    return 0;
}