import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.Arrays;

class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
        String regex = "\\h*\\?\\d+\\h*";
        String string = "select ?1 from students in ?2";
        System.out.println((Arrays.toString(string.split(regex))));
	}
}