#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define FOR(i,n,m) for(int i=(n);i<(m);i++)
#define REP(i,n) FOR(i,0,n)
#define REPR(i,n) for(int i=(n);i>=0;i--)
#define all(vec) vec.begin(),vec.end()
using vi=vector<int>;
using vvi=vector<vi>;
using vl=vector<ll>;
using vvl=vector<vl>;
using P=pair<int,int>;
using PP=pair<int,P>;
using Pl=pair<ll,ll>;
using PPl=pair<ll,Pl>;
using vs=vector<string>;
#define fi first
#define se second
#define pb push_back
template<class T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;}
template<class T>bool chmin(T &a,const T &b){if(a>b){a=b;return true;}return false;}
const ll MOD=1000000007LL;
const int INF=1<<30;
const ll LINF=1LL<<60;
int day[]={31,28,31,30,31,30,31,31,30,31,30,31};
int cd(int a,int b,int c){
    if((a%400==0||a%100&&a%4==0)&&b==2){
        return 29;
    }
    return day[b-1];
}
int main(){
    int a,b,c;
    scanf("%d/%d/%d",&a,&b,&c);
    c+=2;
    if(c>cd(a,b,c)){
        c-=cd(a,b,c);
        b++;
    }
    if(b>12){
        b=1;
        a++;
    }
    printf("%d/%02d/%02d\n",a,b,c);
    return 0;
}