using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    static int[] LList(long n) => Enumerable.Repeat(0, (int)n).Select(_ => int.Parse(ReadLine())).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (v, d) = (c[0], c[1]);
        var ans = new int[v][];
        for (var i = 0; i < v; ++i) ans[i] = new int[v];
        if (d == 1) for (var i = 0; i < v; ++i) for (var j = 0; j < v; ++j) ans[i][j] = 1;
        else for (var i = 0; i < v; ++i)
        {
            ans[i][0] = 1;
            ans[0][i] = 1;
        }
        WriteLine(string.Join("\n", ans.Select(ai => string.Join(" ", ai))));
    }
}