#include<vector>
#include<iostream>
#include<stdio.h>
#include<string>
#include<utility>
#include<algorithm>

#define loop while(1)
#define SZ(x) ((int)(x).size())
#define REP(i,n) for(int i=0, i##_len=(n); i<i##_len; ++i)
#define pushb push_back
#define popb pop_back
#define VI vector<int> 
#define VVI vector<VI>

typedef long long int ll;


using namespace std;

const int mon1[7]={1,3,5,7,8,10,12};
const int mon2[4]={4,6,9,11};
int main()
{
    int y,m,d;
    scanf("%d/%d/%d",&y,&m,&d);
    d+=2;
    REP(i,7){
            if(mon1[i]==m){
                if(d>31){
                    d %=31;
                    m++;
                }
            }
        }
        REP(i,4){
            if(mon2[i]==m){
                if(d>30){
                    d %=30;
                    m++;
                }
            }
        }
    if((y%4==0)^(y%100 ==0)^(y%400 ==0)){
        if(m==2){
            if(d>29){
                d %= 29;
                m++;
            }
        }
    }else{
        
        if(m==2){
            if(d>28){
                d %= 28;
                m++;
            }
        }
    }

    if(m >12){
        y++;
        m %=12;
    }
    printf("%04d/%02d/%02d",y,m,d);
	return 0;
}