/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.math.*;
import java.util.stream.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		BigInteger number = new BigInteger("12345678910111213141516171819");
		List<Integer> res = number
		    .toString()
		    .chars()
		    .mapToObj(c -> Character.digit(c, 10))
		    .collect(Collectors.toList());
		for (int i = 0 ; i != res.size() ; i++) {
			System.out.println(res.get(i));
		}
	}
}

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