#include <stdio.h>

int main(void){
    int x, y, z;
    
    scanf("%d %d\n", &x, &y);
    z = x+4 >= 12 ? x-8 : x+4;
    if(z != y) printf("%d\n", z);
    else printf("%d\n", x-4);
    
    return 0;
}