题解 | #单词倒排#

import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNext()){
            String str = sc.nextLine();
            String[] arr = str.split("[^a-zA-Z]");
            StringBuilder sb = new StringBuilder();
            for(int i =arr.length-1;i>=0;i--){
                sb.append(arr[i]).append(" ");
            }
            System.out.println(sb.toString().trim());
        }
    }
}