#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) begin(v),end(v)
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
using ll = long long;
using pii = pair<int, int>;
constexpr ll INF = 1ll<<30;
constexpr ll longINF = 1ll<<60;
constexpr ll MOD = 1000000007;
constexpr bool debug = false;
//---------------------------------//

int main() {
	int W, H, X;
	cin >> W >> H >> X;
	
	vector<vector<int>> ans;
	if (X == 0) ans.assign(H, vector(W, 0));
	if (X <= 9) {
		if (X % 2 == 0 && H % 2 == 0) {
			ans.assign(H, vector(W, 0));
			REP(i, H) REP(j, W) if (i % 3 == 0 && j % 3 == 0) ans[i][j] = X;
		}
	}
	if (X <= 18) {
		int a, b;
		if (X >= 9) a = 9, b = X - 9;
		else a = X, b = 0;
		ans.assign(H, vector(W, 0));
		if (W % 2 == 0 && H % 3 == 2) {
			REP(i, H) REP(j, W) {
				if (i % 3 == 0 && j % 3 == 0) ans[i][j] = a;
				if (i % 3 == 1 && j % 3 == 0) ans[i][j] = b;
			}
		}
		else if (H % 2 == 0 && W % 3 == 2) {
			REP(i, H) REP(j, W) {
				if (i % 3 == 0 && j % 3 == 0) ans[i][j] = a;
				if (i % 3 == 0 && j % 3 == 1) ans[i][j] = b;
			}
		}
	}
	if (X <= 36) {
		ans.assign(H, vector(W, 0));
		int x[2][2] {};
		REP(i, 10) REP(j, 10) REP(k, 10) {
			int s = i + j + k;
			if (s <= X && X - s <= 9) {
				x[0][0] = i;
				x[0][1] = j;
				x[1][0] = k;
				x[1][1] = X - s;
			}
		}
		if (H % 3 == 2 && W % 3 == 2) {
			REP(i, H) REP(j, W) {
				if (i % 3 == 2 || j % 3 == 2) continue;
				ans[i][j] = x[i % 3][j % 3];
			}
		}
	}
	
	if (ans.empty()) puts("-1");
	else {
		REP(i, H) {
			REP(j, W) printf("%d", ans[i][j]);
			puts("");
		}
	}
}