Problem: Levko loves tables that consist of n rows and n columns very much. He especially loves beautiful tables. A table is beautiful to Levko if the sum of elements in each row and column of the table equals k.

Unfortunately, he doesn't know any such table. Your task is to help him to find at least one of them. 

Input

The single line contains two integers, n and k (1 ≤ n ≤ 100, 1 ≤ k ≤ 1000).

Output

Print any beautiful table. Levko doesn't like too big numbers, so all elements of the table mustn't exceed 1000 in their absolute value.

If there are multiple suitable tables, you are allowed to print any of them.

Examples

Input

2 4


Output

1 3
3 1


Input

4 7


Output

2 1 0 4
4 0 2 1
1 3 3 0
0 3 2 2

Note

In the first sample the sum in the first row is 1 + 3 = 4, in the second row — 3 + 1 = 4, in the first column — 1 + 3 = 4 and in the second column — 3 + 1 = 4. There are other beautiful tables for this sample.

In the second sample the sum of elements in each row and each column equals 7. Besides, there are other tables that meet the statement requirements.

Solution (in JAVA):

Solution:
import java.io.BufferedReader;
	import java.io.FileReader;
	import java.io.IOException;
	import java.io.InputStream;
	import java.io.InputStreamReader;
	import java.io.PrintWriter;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Collections;
	import java.util.LinkedList;
	import java.util.Queue;
	import java.util.StringTokenizer;
	
	import javax.sound.midi.Synthesizer;
	
	
	public class A{
	
		public static void main(String[] args)throws Exception {
			Scanner sc = new Scanner(System.in);
			PrintWriter out = new PrintWriter(System.out);
			StringBuilder sb = new 	StringBuilder();
	
			int n = sc.nextInt() , k =sc.nextInt();
			int cur = 0;
			for(int i = 0 ; i < n ; ++i){
				for(int j = 0 ; j < n ; ++j)
					if(j == i)
					{
						sb.append(k+" ");
					
					}
					else sb.append(0+" ");
				sb.append("\n");
			}
			out.print(sb.toString());
			out.flush();
			out.close();
		}
		
	
		static class Scanner {
			StringTokenizer st;
			BufferedReader br;
	
			public Scanner(InputStream s) {
				br = new BufferedReader(new InputStreamReader(s));
			}
	
			public Scanner(FileReader r) {
				br = new BufferedReader(r);
			}
	
			public String next() throws IOException {
				while (st == null || !st.hasMoreTokens())
					st = new StringTokenizer(br.readLine());
				return st.nextToken();
			}
	
			public int nextInt() throws IOException {
				return Integer.parseInt(next());
			}
	
			public long nextLong() throws IOException {
				return Long.parseLong(next());
			}
	
			public String nextLine() throws IOException {
				return br.readLine();
			}
	
			public double nextDouble() throws IOException {
				String x = next();
				StringBuilder sb = new StringBuilder("0");
				double res = 0, f = 1;
				boolean dec = false, neg = false;
				int start = 0;
				if (x.charAt(0) == '-') {
					neg = true;
					start++;
				}
				for (int i = start; i < x.length(); i++)
					if (x.charAt(i) == '.') {
						res = Long.parseLong(sb.toString());
						sb = new StringBuilder("0");
						dec = true;
					} else {
						sb.append(x.charAt(i));
						if (dec)
							f *= 10;
					}
				res += Long.parseLong(sb.toString()) / f;
				return res * (neg ? -1 : 1);
			}
	
			public boolean ready() throws IOException {
				return br.ready();
			}
	
		}
	
	}