/* -*- coding: utf-8 -*-
 *
 * 3157.cc:  No.3157 Nabeatsu - yukicoder
 */

#include<cstdio>
#include<cstring>
#include<algorithm>

using namespace std;

/* constant */

const int MAX_L = 1000000;

/* typedef */

/* global variables */

char s[MAX_L + 4];

/* subroutines */

void dec(int l, char s[]) {
  int co = 1;
  for (int i = l - 1; co && i >= 0; i--) {
    if (s[i] == '0') s[i] = '9';
    else s[i]--, co = 0;
  }
}

int dig3(int l, char s[]) {
  for (int i = 0; i < l; i++)
    if (s[i] == '3') return i;
  return -1;
}

bool multiple3(int l, char s[]) {
  int sum = 0;
  for (int i = 0; i < l; i++) sum += (s[i] - '0');
  return (sum % 3 == 0);
}

/* main */

int main() {
  scanf("%s", s);
  int l = strlen(s);

  for (;;) {
    //puts(s);

    int d3 = dig3(l, s);
    //printf(" d3=%d\n", d3);

    if (d3 >= 0) {
      s[d3] = '2';
      for (int i = d3 + 1; i < l; i++) s[i] = '9';
    }

    if (multiple3(l, s)) dec(l, s);
    else break;
  }
  
  puts(s);
  return 0;
}