题解 | #查找兄弟单词#

import java.util.Scanner;
import java.util.Arrays;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNext()) {

            int n = in.nextInt();
            String[] dic = new String[n];
            String str = "";
            for (int i = 0; i < n; i++) {
                dic[i] = in.next();
            }
            String  key = in.next();
            int position = in.nextInt();
            int Keylength = key.length();

            for (int i = 0; i < n; i++) {
                if (dic[i].length() == Keylength)
                    str += dic[i] + ",";
            }
            String[] array = str.split(",");
//      for(String strs:array) {
//          System.out.println("Str:"+strs+"str.length:"+array.length);
//      }
            char[] keyArr = key.toCharArray();
            String strab = "";
            for (int i = 0; i < array.length; i++) {
                char[] arraych = array[i].toCharArray();
                Arrays.sort(arraych);
                Arrays.sort(keyArr);
                if (Arrays.equals(arraych, keyArr)) {
                    strab += array[i] + ","; //判断为
                }

            }
//      System.out.println(strab);
            strab = strab.replace(key +",", "");
            strab.trim();
        //  System.out.println(strab);
          if(!strab.isEmpty()){
            String[] target = strab.split(",");
            Arrays.sort(target);
            System.out.println(target.length);
            if(target.length>=position)
            System.out.println(target[position - 1]);
          }else{
            System.out.println(0);
          }
            // System.out.println(strab);




        }
    }
}