#include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define R cin>>
#define Z class
#define ll long long
#define ln cout<<'\n'
#define in(a) insert(a)
#define pb(a) push_back(a)
#define pd(a) printf("%.10f\n",a)
#define mem(a) memset(a,0,sizeof(a))
#define all(c) (c).begin(),(c).end()
#define iter(c) __typeof((c).begin())
#define rrep(i,n) for(ll i=(ll)(n)-1;i>=0;i--)
#define REP(i,m,n) for(ll i=(ll)(m);i<(ll)(n);i++)
#define rep(i,n) REP(i,0,n)
#define tr(it,c) for(iter(c) it=(c).begin();it!=(c).end();it++)
template<Z A>void pr(A a){cout<<a;ln;}
template<Z A,Z B>void pr(A a,B b){cout<<a<<' ';pr(b);}
template<Z A,Z B,Z C>void pr(A a,B b,C c){cout<<a<<' ';pr(b,c);}
template<Z A,Z B,Z C,Z D>void pr(A a,B b,C c,D d){cout<<a<<' ';pr(b,c,d);}
template<Z A>void PR(A a,ll n){rep(i,n){if(i)cout<<' ';cout<<a[i];}ln;}
ll check(ll n,ll m,ll x,ll y){return x>=0&&x<n&&y>=0&&y<m;}
const ll MAX=1e9+7,MAXL=1LL<<61,dx[4]={-1,0,1,0},dy[4]={0,1,0,-1};
typedef pair<int,int> P;

int days(int y,int m,int d){
  if(m<3)y--,m+=12;
  return 365*y+y/4-y/100+y/400+(153*m+8)/5+d;
}

void ymd(int day,int &y,int &m,int &d){
  int lo=-1,hi=100000,mid;
  while(lo+1<hi){
    mid=(lo+hi)/2;
    if(days(mid,12,31)<day)lo=mid;
    else hi=mid;
  }
  y=hi;
  for(m=1;m<12;m++)if(days(y,m+1,1)>day)break;
  d=day-days(y,m,0);
}

void Main() {
  int y,m,d;
  scanf("%d/%d/%d",&y,&m,&d);
  int day=days(y,m,d);
  day+=2;
  ymd(day,y,m,d);
  printf("%d/%02d/%02d\n",y,m,d);
}

int main(){ios::sync_with_stdio(0);cin.tie(0);Main();return 0;}