ABC085A - Already 2018

問題：A - Already 2018

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

int main(void) {
    string s;

    cin.tie(0);
    ios::sync_with_stdio(false);
    cin >> s;
    s[3] = '8';
    cout << s << "\n";
    return 0;
}