# include "bits/stdc++.h"
using namespace std;
using LL = long long;
using ULL = unsigned long long;
const double PI = acos(-1);
template<class T>constexpr T INF() { return ::std::numeric_limits<T>::max(); }
template<class T>constexpr T HINF() { return INF<T>() / 2; }
template <typename T_char>T_char TL(T_char cX) { return tolower(cX); };
template <typename T_char>T_char TU(T_char cX) { return toupper(cX); };
const int vy[] = { -1, -1, -1, 0, 1, 1, 1, 0 }, vx[] = { -1, 0, 1, 1, 1, 0, -1, -1 };
const int dx[4] = { -1,0,1,0 }, dy[4] = { 0,-1,0,1 };
int popcnt(unsigned long long n) { int cnt = 0; for (int i = 0; i < 64; i++)if ((n >> i) & 1)cnt++; return cnt; }
int d_sum(LL n) { int ret = 0; while (n > 0) { ret += n % 10; n /= 10; }return ret; }
int d_cnt(LL n) { int ret = 0; while (n > 0) { ret++; n /= 10; }return ret; }
LL gcd(LL a, LL b) { if (b == 0)return a; return gcd(b, a%b); };
LL lcm(LL a, LL b) { LL g = gcd(a, b); return a / g*b; };
# define ALL(qpqpq)           (qpqpq).begin(),(qpqpq).end()
# define UNIQUE(wpwpw)        (wpwpw).erase(unique(ALL((wpwpw))),(wpwpw).end())
# define LOWER(epepe)         transform(ALL((epepe)),(epepe).begin(),TL<char>)
# define UPPER(rprpr)         transform(ALL((rprpr)),(rprpr).begin(),TU<char>)
# define FOR(i,tptpt,ypypy)   for(LL i=(tptpt);i<(ypypy);i++)
# define REP(i,upupu)         FOR(i,0,upupu)
# define INIT                 std::ios::sync_with_stdio(false);std::cin.tie(0)
# pragma warning(disable:4996)

bool is_leap(int y) {
	if ((y % 400) == 0) {
		return true;
	}
	else if ((y % 100) == 0) {
		return false;
	}
	else if ((y % 4) == 0) {
		return true;
	}
	return false;
}

int get_days_in_month(int y, int m) {
	assert(m >= 1 && m <= 12);
	int days[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	if (m == 2 && is_leap(y)) {
		return days[1] + 1;
	}
	return days[m - 1];
}

class MyDate {
public:
	int day;
	int month;
	int year;

	MyDate(int y, int m, int d) {
		year = y;
		month = m;
		day = d;
	}

	MyDate tomorrow() {
		int td = day, tm = month, ty = year;

		td++;
		if (td > get_days_in_month(year, month)) {
			td = 1;
			tm++;
			if (tm > 12) {
				ty++;
				tm = 1;
			}
		}
		return MyDate(ty, tm, td);
	}
};

int main() {
	int a, b, c;
	char d;
	cin >> a >> d >> b >> d >> c;
	MyDate date(a, b, c);
	date = date.tomorrow();
	date = date.tomorrow();
	cout << date.year << "/" << (date.month < 10 ? "0" : "") << date.month << "/" << (date.day < 10 ? "0" : "") << date.day << endl;
}