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

int days[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int Y, M, D;

int main()
{
    string s;
    cin >> s;
    sscanf(s.c_str(), "%d/%d/%d", &Y, &M, &D);
    if (Y % 4 == 0 && !(Y % 100 == 0 && Y % 400 != 0))
        days[2] = 29;
    D += 2;
    if (days[M] < D)
    {
        D -= days[M];
        M++;
        if (12 < M)
        {
            Y++;
            M = 1;
        }
    }

    printf("%04d/%02d/%02d\n", Y, M, D);
}