MongoDB

 

On the first line, print an integer, , denoting the number of tokens in string  (they do not need to be unique). Next, print each of the  tokens on a new line in the same order as they appear in input string .

•  is composed of any of the following: English alphabetic letters, blank spaces, exclamation points (!), commas (,), question marks (?), periods (.), underscores (_), apostrophes ('), and at symbols (@).

import java.io.*;

import java.util.*;

public class Solution {

public static void main(String[] args) {

Scanner scan = new Scanner(System.in);

String s = scan.nextLine();

// Write your code here.

String[] arr = s.split("[ !,?._'@]+");

System.out.println(arr.length);

for (String string : arr) {

System.out.println(string);

}

scan.close();

}

}