ABC154B - I miss you...

問題：B - I miss you...

#include <iostream>
#include <string>
using namespace std;

#define REP(i, n) for (int i = 0; i < (n); ++i)

int main(void) {
    string s;

    cin.tie(0);
    ios::sync_with_stdio(false);
    cin >> s;
    REP(i, s.length()) {
        cout << "x";
        if (i == s.length() - 1) {
            cout << "\n";
        }
    }

    return 0;
}