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#include <cstdio>
#include <cstring>
#include <iostream>
using namespace std;
int a,b,c,d,sum;
int main(){
    cin>>a>>b>>c>>d;
    a=a%23;
    b=b%28;
    c=c%33;
    sum=a*5544+b*14421+c*1288-d;
    sum+=21252;
    sum%=21252;
    if(sum==0)sum=21252;
    cout<<sum<<endl;
    return 0; 
}