题解 | #单词倒排#

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        while (in.hasNext()) {
            String a = in.nextLine();
            char[] arr = a.toCharArray();

            for(int i=0; i<arr.length; i++){
                if(!Character.isLetter(arr[i])){
                    arr[i] = ' ';
                }
            }
            
            String str = String.valueOf(arr);
            String[] strArr = str.split(" ");

            for(int i=strArr.length-1; i>=0; i--){
                System.out.print(strArr[i] + " ");
            }
        }
    }
}