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

int main() {
	int Y, M, D, X[13] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	char C;
	cin >> Y >> C >> M >> C >> D;
	if (M == 2 && D == 27) {
		if ((Y % 4 == 0 && Y % 100 != 0) || Y % 400) cout << Y << "/02/29" << endl;
		else cout << Y << "/03/01" << endl;
	}
	else if (M == 2 && D == 28) {
		if ((Y % 4 == 0 && Y % 100 != 0) || Y % 400) cout << Y << "/03/01" << endl;
		else cout << Y << "/03/02" << endl;
	}
	else {
		D += 2;
		if (D > X[M]) {
			D -= X[M];
			M++;
		}
		if (M > 12) {
			M = M % 12;
			Y++;
		}
		cout << Y << "/" << std::setfill('0') << std::right << std::setw(2) << M << "/" << std::setfill('0') << std::right << std::setw(2) << D << endl;
	}
}