#include <cassert>
#include <vector>
#include <iostream>
using namespace std;
int main() {
    int w, h, x; cin >> w >> h >> x;
    int a[3][3] = {{0, 0, 0},{0, 0, 0},{0, 0, 0}};
    int s = 0;
    for (int i = 0; i < 2; i++) {
        if (h % 3 == i) continue;
        for (int j = 0; j < 2; j++) {
            if (w % 3 == j) continue;
            a[i][j] = min(9, x-s);
            s += a[i][j];
        }
    }
    if (s != x) cout << -1 << endl;
    else {
        vector ans(h, vector<int>(w, 0));
        for (int i = 0; i < h; i++)
            for (int j = 0; j < w; j++)
                ans[i][j] = a[i%3][j%3];                
        for (int i = 0; i < h; i++) {
            for (int a : ans[i]) cout << a;
            cout << endl;
        }

        for (int i = 0; i < h; i++)
            for (int j = 0; j < w; j++) {
                int sum = 0;
                for (int x = i-1; x <= i+1; x++)
                    for (int y = j-1; y <= j+1; y++)
                        if (0 <= x && x < h && 0 <= y && y < w)
                            sum += ans[x][y];
                cerr << i << ' ' << j << ' ' << sum << endl;
                assert(sum == x);
            }
    }
}