#include "bits/stdc++.h"

#define REP(i,n) for(ll i=0;i<ll(n);++i)
#define RREP(i,n) for(ll i=ll(n)-1;i>=0;--i)
#define FOR(i,m,n) for(ll i=m;i<ll(n);++i)
#define RFOR(i,m,n) for(ll i=ll(n)-1;i>=ll(m);--i)
#define ALL(v) (v).begin(),(v).end()
#define UNIQUE(v) v.erase(unique(ALL(v)),v.end());
#define INF 1000000001ll
#define MOD 1000000007ll
#define EPS 1e-9

const int dx[8] = { 1,1,0,-1,-1,-1,0,1 };
const int dy[8] = { 0,1,1,1,0,-1,-1,-1 };


using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<vi> vvi;
typedef vector<vl> vvl;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	int y, m, d;
	char c;
	cin >> y >> c >> m >> c >> d;
	vi day = { 31,28,31,30,31,30,31,31,30,31,30,31 };
	d += 2;
	if ((y % 4 == 0 &&y%100!=0)|| y%400==0)day[1] = 29;
	if (day[m - 1] < d) {
		d -= day[m - 1];
		m++;
	}
	if (m == 13) {
		m = 1;
		y++;
	}
	cout << y << c << setw(2) << setfill('0') << m << c << setw(2) << setfill('0') << d << endl;
}