java-string-tokens.java

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.
        s = s.trim();

        if (s.length() == 0) {
            System.out.println(0);
            return;
        }

        String[] tokens = s.split("[^a-zA-Z]+");

        System.out.println(tokens.length);
        for(String token: tokens) {
            System.out.println(token);
        }

        scan.close();
    }
}