#include<bits/stdc++.h>
using namespace std;

int main(){
  string S;
  int y, m, d, XX =28;

  cin>>S;
  d = (S[8]-'0')*10 + S[9]-'0';
  m = (S[5]-'0')*10 + S[6]-'0';
  y = (S[0]-'0')*1000 + (S[1]-'0')*100+(S[2]-'0')*10 + S[3]-'0';
  d += 2;

  if(y%400 == 0 || (y%4==0 && y%100 != 0)) XX = 29;
  if(m == 2){
    if(d > XX)m++, d = d-XX;
  } else if(m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10){
    if(d > 31)m++, d = d-31;
  } else if(m == 12){
    if(d > 31)y++, m = 1,d = d-31;
  } else {
    if(d > 30)m++, d = d-30;
  }

  cout<<'2'<<(char)((y%1000)/100 + '0')<<(char)((y%100)/10 + '0')<<(char)(y%10 + '0')<<'/';
  cout<<(char)(m/10 + '0')<<(char)(m%10 + '0')<<'/'<<(char)(d/10 + '0')<<(char)(d%10 + '0')<<endl;
  return 0;
}