// Arup Guha
// 5/21/2024
// Solution to Kattis Problem: Magic Trick
// https://open.kattis.com/problems/magictrick

using namespace std;

#include <bits/stdc++.h>

int main() {

    // Read string.
    string s;
    cin >> s;

    // Set up frequency array.
    vector<int> freq(26,0);
    int res = 1;

    // Go through letters.
    for (int i=0; i<s.size(); i++) {
        freq[s[i]-'a']++;

        // Oops we found a duplicate.
        if (freq[s[i]-'a']>1)
            res = 0;
    }

    // Ta da!
    cout << res << endl;
    return 0;
}