/*
ID: Yoana Zelova zelova1
PROG:
LANG: C++
*/
#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cmath>
#include<string>
#include<stack>
#include<queue>
#include<vector>
#include<fstream>
using namespace std;
long long a,b,c;
string s;
int main()
{
    freopen ("digits.in","r",stdin);
    freopen ("digits.out","w",stdout);
    cin>>s>>a>>b>>c;
    cout<<s[9-a]-48+s[9-b]-48+s[9-c]-48<<endl;
    return 0;
}