#include<bits/stdc++.h>
typedef long long ll;
#define pb push_back
#define mp make_pair
#define fi first
#define se second
using namespace std;
string s;
int main()
{
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>s;
	s[0]='2';
	s[1]='0';
	s[2]='1';
	s[3]='8';
	cout<<s<<"\n";
}