#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<long long> VL;
typedef vector<VL> VVL;
typedef long long LL;
#define all(a) (a).begin(), (a).end()
#define Yes(n) cout << ((n) ? "Yes" : "No"  ) << endl
#define YES(n) cout << ((n) ? "YES" : "NO"  ) << endl
#define ALL(a)  (a).begin(),(a).end()
#define pb push_back

LL aaa;

bool han(LL n){
  LL m=sqrt(n*1.0)-10;
  m=max(m,LL(0));
  rep(i,12){
    if(m*m==n){
      //cout<<m<<endl;
      aaa=m;return 1;}
    m++;
  }
  return 0;
}

int main() {
  string s;cin>>s;
  int n=s.size();
  bool han=0;
  rep(i,n){
    if(s[i]=='3'){s[i]='2';
      han=1;
      for(int j=i+1;j<n;j++){s[j]='9';}
    }
  }
  if(han){
    int sum=0;
    rep(i,n){sum+=s[i]-'0';}
    if(sum%3==0){s[n-1]--;}
    cout<<s<<endl;
    return 0;
  }
  int sum=0;
  rep(i,n){sum+=s[i]-'0';}
  if(sum%3!=0){cout<<s<<endl;}
  else{
    for(int i=n-1;i>0;i--){
      if(s[i]!='0'){s[i]--;cout<<s<<endl;return 0;}
      s[i]='9';
    }
  }
}