#include <bits/stdc++.h>
using namespace std;

struct iofast_t {
    iofast_t() {
        ios::sync_with_stdio(false);
        cin.tie(nullptr); cout.tie(nullptr);
    }
} iofast;

struct uns_t {} uns;
template <typename Element, typename Head, typename ...Args>
auto vec(Element init, Head arg, Args ...args) {
    if constexpr (sizeof...(Args) == 0) return std::vector(arg, init);
    else return std::vector(arg, vec(init, args...));
}
template <typename Element, typename Head, typename ...Args>
auto vec(uns_t, Head arg, Args ...args) {
    return vec(Element(), arg, args...);
}

int main() {
    int w, h, x; cin >> w >> h >> x;
    int n = (w % 3 == 0 ? 1 : w % 3) * (h % 3 == 0 ? 1 : h % 3);

    if (x < n || n * 9 < x) {
        cout << -1 << endl;
        return 0;
    }

    if (w % 3 == 0 && h % 3 == 0) {
        for (int i = 0; i < h; ++i) {
            for (int j = 0; j < w; ++j) {
                if (i % 3 != 1 || j % 3 != 1) {
                    cout << 0;
                    continue;
                }
                cout << x;
            }
            cout << endl;
        }
    }

    if (w % 3 == 1 && h % 3 == 0) {
        for (int i = 0; i < h; ++i) {
            for (int j = 0; j < w; ++j) {
                if (i % 3 != 1 || j % 3 != 0) {
                    cout << 0;
                    continue;
                }
                cout << x;
            }
            cout << endl;
        }
    }

    if (w % 3 == 2 && h % 3 == 0) {
        for (int i = 0; i < h; ++i) {
            for (int j = 0; j < w; ++j) {
                if (i % 3 != 1 || j % 3 == 2) {
                    cout << 0;
                    continue;
                }
                if (j % 3 == 0) {
                    cout << x / 2;
                    continue;
                }
                cout << (x + 1) / 2;
            }
            cout << endl;
        }
    }

    if (w % 3 == 0 && h % 3 == 1) {
        for (int i = 0; i < h; ++i) {
            for (int j = 0; j < w; ++j) {
                if (i % 3 != 0 || j % 3 != 1) {
                    cout << 0;
                    continue;
                }
                cout << x;
            }
            cout << endl;
        }
    }

    if (w % 3 == 1 && h % 3 == 1) {
        for (int i = 0; i < h; ++i) {
            for (int j = 0; j < w; ++j) {
                if (i % 3 != 0 || j % 3 != 0) {
                    cout << 0;
                    continue;
                }
                cout << x;
            }
            cout << endl;
        }
    }

    if (w % 3 == 2 && h % 3 == 1) {
        for (int i = 0; i < h; ++i) {
            for (int j = 0; j < w; ++j) {
                if (i % 3 != 0 || j % 3 == 2) {
                    cout << 0;
                    continue;
                }
                if (j % 3 == 0) {
                    cout << x / 2;
                    continue;
                }
                cout << (x + 1) / 2;
            }
            cout << endl;
        }
    }

    if (w % 3 == 0 && h % 3 == 2) {
        for (int i = 0; i < h; ++i) {
            for (int j = 0; j < w; ++j) {
                if (i % 3 == 2 || j % 3 != 1) {
                    cout << 0;
                    continue;
                }
                if (i % 3 == 0) {
                    cout << x / 2;
                    continue;
                }
                cout << (x + 1) / 2;
            }
            cout << endl;
        }
    }

    if (w % 3 == 1 && h % 3 == 2) {
        for (int i = 0; i < h; ++i) {
            for (int j = 0; j < w; ++j) {
                if (i % 3 == 2 || j % 3 != 0) {
                    cout << 0;
                    continue;
                }
                if (i % 3 == 0) {
                    cout << x / 2;
                    continue;
                }
                cout << (x + 1) / 2;
            }
            cout << endl;
        }
    }

    if (w % 3 == 2 && h % 3 == 2) {
        for (int i = 0; i < h; ++i) {
            for (int j = 0; j < w; ++j) {
                if (i % 3 == 2 || j % 3 == 2) {
                    cout << 0;
                    continue;
                }
                if (i % 3 == 0 || j % 3 == 0) {
                    cout << x / 4;
                    continue;
                }
                cout << (x - x / 4 * 3);
            }
            cout << endl;
        }
    }
}