import java.io.*;
import java.math.BigInteger;
import java.util.*;

public class Main {
    public static int[] prefix_function(String s) {
        int n = s.length();
        int[] pi = new int[n];
        for (int i = 1; i < n; ++i) {
            int j = pi[i - 1];
            while (j > 0 && s.charAt(i) != s.charAt(j))
                j = pi[j - 1];
            if (s.charAt(i) == s.charAt(j))
                ++j;
            pi[i] = j;
        }
        return pi;
    }

    static final ArrayList<Integer> Index = new ArrayList<Integer>();
    static final HashSet<String> h = new HashSet<String>();
    static String Input;
    static int m;

    public static boolean solve(int idx){
        String s = Input.substring(idx, idx+m);
        boolean f = h.contains(s);
        if(f){
            System.out.println(s);
            return true;
        }
        h.add(s);
        return false;
        
    }

    public static void numberOfOcurrence(String T, String P) {
        int matched = 0;
        int[] fail = prefix_function(P);
        m = P.length();
        for (int i = 0, n = T.length(); i < n; i++) {
            while (matched > 0 && T.charAt(i) != P.charAt(matched))
                matched = fail[matched - 1];
            if (T.charAt(i) == P.charAt(matched)) {
                matched++;
                if (matched == m) {
                    if(solve(i - m + 1))
                        return;
                    matched = fail[matched - 1];
                }
            }
        }
    }

    public static void main(String[] args) throws IOException {
        InputReader in = new InputReader(System.in);
        FastPrinter out = new FastPrinter(System.out);
        Input = in.nextLine();
        numberOfOcurrence(Input.replaceAll("[0-9]", "1"), "11-11-1111");
        out.close();
    }
}

class InputReader {
    public BufferedReader reader;
    public StringTokenizer tokenizer;

    public InputReader(InputStream stream) {
        reader = new BufferedReader(new InputStreamReader(stream), 32768);
        tokenizer = null;
    }

    public String next() {
        while (tokenizer == null || !tokenizer.hasMoreTokens()) {
            try {
                tokenizer = new StringTokenizer(reader.readLine());
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return tokenizer.nextToken();
    }

    public String nextLine() {
        try {
            return reader.readLine();
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

    public int[] readIntArray(int n) {
        int[] ret = new int[n];
        for (int i = 0; i < n; i++)
            ret[i] = nextInt();
        return ret;
    }

    public int nextInt() {
        return Integer.parseInt(next());
    }

    public long nextLong() {
        return Long.parseLong(next());
    }

    public double nextDouble() {
        return Double.parseDouble(next());
    }

    public BigInteger nextBigInt() {
        return new BigInteger(next());
    }
}

class FastPrinter extends PrintWriter {

    public FastPrinter(OutputStream out) {
        super(out);
    }

    public FastPrinter(Writer out) {
        super(out);
    }

}