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