#include <iostream>
#include <set>
#include <string>
using namespace std;
 
int main() {
    string word;
    cin >> word;
 
    set<char> letters;
    set<char>::iterator iter;
    bool duplicateFound = false;
 
    for (int i = 0; i < word.length(); i++) {
        for (iter = letters.begin(); iter != letters.end(); ) {
            if (*iter == word[i]) {
                duplicateFound = true;
                break;
            } else {
                ++iter;
            }
        }
 
        if (duplicateFound) {
            cout << "пповторюється" <<" "<< word[i] << endl;
            break;
        }
 
        letters.insert(word[i]);
    }
 
    if (!duplicateFound) {
        cout << "унікальні." << endl;
    }
 
    return 0;
}

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