#include <stdio.h>
#define swap(type, a, b) do{type t = a; a = b; b = t;}while(0)

int main(void){
    int x, y;
    
    scanf("%d %d\n", &x, &y);
    if(x>y) swap(int, x, y);
    if(y-x == 4) printf("%d\n", (y+4)%12);
    else printf("%d\n", y-4);

    return 0;
}