#include<bits/stdc++.h>
using namespace std;
using Int=long long;
using Real=long double;
template<class T,class S>inline bool chmin(T&A,S B){if(A>B){A=B;return true;}else{return false;}}
template<class T,class S>inline bool chmax(T&A,S B){if(A<B){A=B;return true;}else{return false;}}
#define REP(i,n)for(int i=0;i<(n);++i)
#define REP1(i,n)for(int i=1;i<=(n);++i)
#define ALL(x)begin(x),end(x)
#define drop(x){cout<<(x)<<'\n';return;}
string S;
int Y,M,D;
void sol()
{
	cin>>S;
	Y=stoi(S.substr(0,4)),M=stoi(S.substr(5,2)),D=stoi(S.substr(8,2));
	int A[]={31,(Y%4==0)^(Y%100==0)^(Y%400==0)?29:28,31,30,31,30,31,31,30,31,30,31};
	D+=2;
	if(D>A[M-1])
	{
		D-=A[M-1];
		if(++M>12)++Y,M=1;
	}
	string a=to_string(Y),b=to_string(M),c=to_string(D);
	if(b.size()<2)b="0"+b;
	if(c.size()<2)c="0"+c;
	cout<<a+"/"+b+"/"+c+"\n";
}
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	cout<<fixed<<setprecision(16);
	int T=1;
	//cin>>T;
	while(T--)sol();
}