题解 | #查找兄弟单词#

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String input = in.nextLine();
        String[]  datas = input.split(" ");
        String compareStr = datas[datas.length - 2];
        int index = Integer.valueOf(datas[datas.length - 1]);
        List dataList = new ArrayList();
        for (int i = 1; i < datas.length - 2 ; i++ ) {
            if (datas[i].equals(compareStr)) {
                continue;
            }
            if (datas[i].length() == compareStr.length()) {
                boolean flag = true;
                for ( int j = 0; j < compareStr.length(); j++) {
                    String compStr = compareStr.substring(j, j + 1);
                    int countComp = 0;
                    int countData = 0;
                    for (int k = 0; k < datas[i].length(); k++) {
                        if (datas[i].substring(k, k + 1).equals(compStr)) {
                            countData++;
                        }
                        if (compareStr.substring(k, k + 1).equals(compStr)) {
                            countComp++;
                        }
                    }
                    if (countComp != countData) {
                        flag = false;
                        break;
                    }
                }
                if (flag) {
                    dataList.add(datas[i]);
                }
            }
        }
        System.out.println(dataList.size());
        if (dataList.size() > 0 && index < dataList.size()+1) {
            System.out.println(dataList.stream().sorted().skip(index-1).findFirst().get());
        }
    }
}