Poj Solution 3096

http://poj.org/problem?id=3096

//* @author popop0p0popo
import java.util.*;
import java.io.*;

public class Main{
 public static void main(String[] args){
  Scanner scanner=new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    boolean flag;
    int index;
    String s;
    String[] pair;
    while (true){
        s=scanner.next();
        if (s.equals("*")){
            break;
        }
        if (s.length()==1){
            System.out.println(s+" is surprising.");
            continue;
        }
        index=0;
        flag=true;
        while (index< s.length()-1){
            pair=new String[s.length()-index-1];
            for (int i=0;i< pair.length ;i++ ){
                pair[i]=""+s.charAt(i)+s.charAt(i+index+1);
            }
            if (!check(pair)){
                flag=false;
                break;
            }
            index++;
        }
        if (flag){
            System.out.println(s+" is surprising.");
        }
        else{
            System.out.println(s+" is NOT surprising.");
        }
    }
  }

  public static boolean check(String[] s){
    for (int i=0;i< s.length-1 ;i++ ){
        for (int j=i+1;j< s.length ;j++ ){
            if (s[i].equals(s[j])){
                return false;
            }
        }
    }
    return true;
 }
}