/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* 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
	{
		int array[][] = new int[7][];
		for(int i=0; i<array.length; i++)
		{
			array[i] = new int[i + 1];
			for(int j=0; j<array[i].length; j++)
			{
				array[i][j] = j;
				System.out.print(array[i][j]);
			}
			System.out.println();
		}
	}
}

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