#include <bits/stdc++.h>
using namespace std;
int main()
{
    int y,m,d;
    vector<int> ld{31,28,31,30,31,30,31,31,30,31,30,31};
    scanf("%d/%d/%d",&y,&m,&d);
    if(y%400==0||(y%4==0&&y%100!=0))ld[1]=29;
    d+=2;
    if(d>ld[m-1]){
        d-=ld[m-1];m++;
        if(m>12)y++,m=1;
    }
    printf("%04d/%02d/%02d\n",y,m,d);
    return 0;
}