/* package whatever; // don't place package name! */
 
import java.util.*;
import java.util.stream.IntStream;
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
	{
		IntStream.rangeClosed(1, 15).forEach(i -> {
			int end = (i * (i + 1))/2;
			IntStream.rangeClosed(end -i + 1, end).forEach(j -> {
				System.out.print(j + " ");
			});
			System.out.println("");
		});
	}
}

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