/* 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[] arg) throws java.lang.Exception {
		IntStream.rangeClosed(1, 15).boxed().flatMap(i -> {
			int end = (i * (i + 1)) / 2;
			return IntStream.rangeClosed(end - i + 1, end).boxed().map(j -> j + (j == end ? "\n" : " "));
		}).forEach(System.out::print);
	}
}

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