// Template
#include <bits/stdc++.h>
#define rep_override(x, y, z, name, ...) name
#define rep2(i, n) for (int i = 0; i < (int)(n); ++i)
#define rep3(i, l, r) for (int i = (int)(l); i < (int)(r); ++i)
#define rep(...) rep_override(__VA_ARGS__, rep3, rep2)(__VA_ARGS__)
#define all(x) (x).begin(), (x).end()
using namespace std;
using ll = long long;
constexpr int inf = 1001001001;
constexpr ll infll = 3003003003003003003LL;
template <typename T>
inline bool chmin(T &x, const T &y) {
    if (x > y) {
        x = y;
        return true;
    }
    return false;
}
template <typename T> 
inline bool chmax(T &x, const T &y) {
    if (x < y) {
        x = y;
        return true;
    }
    return false;
}
template <typename T>
istream &operator>>(istream &is, vector<T> &vec) {
    for (T &element : vec) is >> element;
    return is;
}
template <typename T>
ostream &operator<<(ostream &os, const vector<T> &vec) {
    for (int i = 0, vec_len = (int)vec.size(); i < vec_len; ++i) {
        os << vec[i] << (i + 1 == vec_len ? "" : " ");
    }
    return os;
}
struct IOSET {
    IOSET() {
        cin.tie(nullptr);
        ios::sync_with_stdio(false);
        cout << fixed << setprecision(10);
    }
} ioset;

// Main
int main() {
    int h, w, x;
    cin >> w >> h >> x;
    vector<vector<int>> v(3, vector<int>(3, -1));
    rep(i, 3) rep(j, 3) {
        if ((i - 1) % 3 == 0 || (h - i) % 3 == 0) v[i][j] = 0;
        if ((j - 1) % 3 == 0 || (w - j) % 3 == 0) v[i][j] = 0;
        if (v[i][j] == -1) {
            v[i][j] = min(x, 9);
            x -= v[i][j];
        }
    }
    if (x) {
        cout << "-1\n";
        return 0;
    }
    rep(i, h) {
        rep(j, w) {
            cout << (char)('0' + v[i % 3][j % 3]);
        }
        cout << '\n';
    }
}