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();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (n, m) = (c[0], c[1]);
        var rev = false;
        if (n > m)
        {
            (n, m) = (m, n);
            rev = true;
        }
        var len = n * n + m * m;
        // var map = new char[len][];
        // for (var i = 0; i < map.Length; ++i) map[i] = Enumerable.Repeat(' ', len).ToArray();
        var xstart = 0;
        var ystart = 0;
        var ans1 = new List<int[]>();
        var ans2 = new List<int[]>();
        while (true)
        {
            var cx = xstart;
            var cy = ystart;
            do
            {
                ans1.Add(new int[] { cx, cy });
                // for (var i = 0; i < n; ++i) for (var j = 0; j < n; ++j)
                // {
                //     map[(cx + i) % len][(cy + j) % len] = '.';
                // }
                cy = (cy + n) % len;
                ans2.Add(new int[] { cx, cy });
                // for (var i = 0; i < m; ++i) for (var j = 0; j < m; ++j)
                // {
                //     map[(cx + i) % len][(cy + j) % len] = '#';
                // }
                cx = (cx + m) % len;
            } while (cx != xstart || cy != ystart);
            if (ans1.Count == len) break;
            if (n == m)
            {
                xstart = (xstart + n * 2) % len;
            }
            else
            {
                xstart = (xstart + m - n) % len;
                ystart = (ystart + n + m) % len;
            }
        }
        // WriteLine(string.Join("\n", map.Select(mi => string.Concat(mi))));
        if (rev)
        {
            WriteLine(string.Join("\n", ans2.Select(ai => $"{ai[0]} {ai[1]}")));
            WriteLine(string.Join("\n", ans1.Select(ai => $"{ai[0]} {ai[1]}")));
        }
        else
        {
            WriteLine(string.Join("\n", ans1.Select(ai => $"{ai[0]} {ai[1]}")));
            WriteLine(string.Join("\n", ans2.Select(ai => $"{ai[0]} {ai[1]}")));
        }
        // for (var i = 0; i < map.Length; ++i) for (var j = 0; j < map[i].Length; ++j)
        // {
        //     if (map[i][j] == ' ')
        //     {
        //         WriteLine(string.Join("\n", map.Select(mi => string.Concat(mi))));
        //         return;
        //     }
        // }
    }
}