package chelper;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

import io.InputReader;
import io.OutputWriter;
import misc.GCJSolution;


public class TaskB extends GCJSolution {

  public void solve(int testNumber, InputReader in, OutputWriter out) {
    wrapSolve(testNumber, in, out);
  }

  long parse(char[] s) {
    return Long.parseLong(new String(s));
  }

  boolean isGood(char[] s) {
    char[] s2 = Arrays.copyOf(s, s.length);
    Arrays.sort(s2);
    return Arrays.equals(s, s2);
  }

  @Override
  public void solve(int testNumber) {
    char[] s = in.nextString().toCharArray();

    List<char[]> vars = new ArrayList<>();

    vars.add(Arrays.copyOf(s, s.length));

    for (int i = 0; i < s.length; i++) {
      char[] s2 = Arrays.copyOf(s, s.length);

      if (s[i] >= '1') {
        s2[i] = (char) (s[i] - 1);
        for (int j = i + 1; j < s.length; j++) {
          s2[j] = '9';
        }
        vars.add(s2);
      }
    }

    vars = vars.stream().filter(this::isGood).sorted((o1, o2) -> Long.compare(parse(o1), parse(o2))).collect(Collectors.toList());

    out.println(parse(vars.get(vars.size() - 1)));
  }
}