#include <stdio.h>
int main(void)
{
    int A=0, B=0, C=0, D=0, deadline=0;
    
    scanf("%d %d %d %d", &A, &B, &C, &D);
    deadline = (31-A) + B;

    if(deadline >= C){
        printf("%d\n", 1);
    }
    else if(deadline<C == deadline>=D){
        printf("%d\n", 2);
    }
    else{
        printf("%d\n", 3);
    }

    return 0;
}