IntegerCheck

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class IntegerCheck {
  public static void main(String[] args) {
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String s = null;
    int x = -1;
    while (true) {
      try {
        s = in.readLine();
      }
      catch (Exception e) {
      }
      if (s == null) continue;
      try {
        x = new Integer(s);
      }
      catch (Exception e) {
      }
      if (x == 1 || x == 2) break;
    }
  }
}