above java 11 try using

''' import java.io.; import java.util.;

public class Solution {

public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    String str = scan.nextLine();
    if(str.isBlank()){
        System.out.println(0);  
    }
    else{
        String[] strArr = str.trim().split("[ !,?._'@]+");
        System.out.println(strArr.length);
        for(String data: strArr){
            System.out.println(data);
        }
    }
    scan.close();
}

}

'''