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 (w, h, x) = (c[0], c[1], c[2]);
        var hoffset = h % 3 == 0 ? 1 : 0;
        var woffset = w % 3 == 0 ? 1 : 0;
        var hwidth = h % 3 == 2 ? 2 : 1;
        var wwidth = w % 3 == 2 ? 2 : 1;
        var max = hwidth * wwidth * 9;
        if (x > max)
        {
            WriteLine(-1);
            return;
        }
        var ans = new int[h][];
        for (var i = 0; i < ans.Length; ++i) ans[i] = new int[w];
        var rest = x;
        for (var i = 0; i < hwidth; ++i) for (var j = 0; j < wwidth; ++j)
        {
            ans[i + hoffset][j + woffset] = Math.Min(9, rest);
            rest -= ans[i][j];
        }
        for (var i = 0; i < h; ++i) for (var j = 0; j < w; ++j)
        {
            if (i < 3 && j < 3) continue;
            ans[i][j] = ans[i % 3][j % 3];
        }
        WriteLine(string.Join("\n", ans.Select(ai => string.Concat(ai))));
    }
}