题解 | #单词倒排#

import java.io.*;
import java.util.*;

public class Main{
    public static void main(String [] args) throws Exception{
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String x = bf.readLine();
        StringBuilder sb = new StringBuilder();
        for(int i = 0; i< x.length(); i++){
            char item = x.charAt(i);
            if(item >64 && item <123){
                sb.append(item);
            }else{
                sb.append(" ");
            }
        }
        
        String [] str = sb.toString().split(" ");
        sb = new StringBuilder();
        for(int j = str.length-1; j>=0; j--){
            sb.append(str[j]).append(" ");
        }
        
        System.out.println(sb.toString());
    }
}