#include "testlib.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
#define all(a) begin(a), end(a)

const int min_N = 1;
const int max_N = 400000;
int main() {
    registerValidation();
    string S = inf.readString();
    assert((int)S.size() >= min_N && (int)S.size() <= max_N);
    inf.readEof();
}