#include <bits/stdc++.h>
using namespace std;

int main()
{
	string S;
	cin >> S;

	int y, m, d;
	sscanf( S.c_str(), "%d/%d/%d", &y, &m, &d );
	struct tm tm = { 0, 0, 0, d, m - 1, y - 1900 };
	time_t time = mktime( &tm  ) + 60 * 60 * 24 * 2;
	struct tm *ltime = localtime( &time );
	char ans[16];
	sprintf( ans, "%04d/%02d/%02d", ltime->tm_year + 1900, ltime->tm_mon + 1, ltime->tm_mday );

	cout << ans << endl;
}