#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=int(a);i<int(b);++i)
using namespace std;
typedef long long ll;
int INF = (1LL << 30) - 1;
int MOD = 1e9+7;
main(){
    int y,m,d;
    scanf("%d/%d/%d",&y ,&m ,&d);
    d += 2;
    if(m == 2){
        if(y % 400 == 0 || y % 100 != 0 && y % 4 == 0){
            m += (d-1) / 29;
            d = ((d-1) % 29) + 1;
        }else{
            m += (d-1) / 28;
            d = ((d-1) % 28) + 1;
        }
    }else if(m == 4 || m == 6 || m == 9 || m == 11){
        m += (d-1) / 30;
        d = ((d-1) % 30) + 1;
    }else{
        m += (d-1) / 31;
        d = ((d-1) % 31) + 1;
    }
    y += (m-1) / 12;
    m = (m-1) % 12 + 1;
    printf("%04d/%02d/%02d",y ,m ,d);
}