#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using vl = vector<ll>;
template<class T> using vc = vector<T>;
template<class T> using vvc = vector<vector<T>>;

#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define rep(i, n) for (ll i = 0; i < (n); i++)
#define repr(i, n) for (ll i = (n)-1; i >= 0; i--)
#define repe(i, l, r) for (ll i = (l); i < (r); i++)
#define reper(i, l, r) for (ll i = (r)-1; i >= (l); i--)
#define repa(i,n) for (auto& i: n)

template<class T1, class T2> inline bool chmax(T1 &a, const T2 &b) {if (a<b) { a=b; return 1;} return 0;}
template<class T1, class T2> inline bool chmin(T1 &a, const T2 &b) {if (b<a) { a=b; return 1;} return 0;}
struct init{init(){cin.tie(0);ios::sync_with_stdio(false);cout<<fixed<<setprecision(15);}}init_;

#ifdef DEBUG
template <class T> void verr(const set<T> &st) { repa(a, st) cerr << a << " "; cerr << endl; }
template <class S, class T> void verr(const map<S, T> &mp) { repa(a, mp) cerr << "{" << a.first << ", " << a.second << "} "; cerr << endl; }
template <class S, class T, class N> void verr(const vector<pair<S,T>>& a, const N& n) { rep(i, n) cerr << "{" << a[i].first << ", " << a[i].second << "} "; cerr << endl; }
template <class T, class N> void verr(const vector<T>& a, const N& n) { rep(i, n) cerr << a[i] << " "; cerr << endl; }
ll dbgt = 1; void err() { cerr << "passed " << dbgt++ << endl; }
template<class H, class... T> void err(H&& h,T&&... t){ cerr<< h << (sizeof...(t)?" ":"\n") << flush; if(sizeof...(t)>0) err(forward<T>(t)...); }
#endif

const ll INF = 4e18;
const ld EPS = 1e-11;
const ld PI = acos(-1.0L);
const ll MOD = 1e9 + 7;
// const ll MOD = 998244353;
//--------------------------------------------------------------------------------//

int main() {
    ll W, H, X;
    cin >> W >> H >> X;
    if(X > 36) {
        cout << -1 << endl;
        return 0;
    }

    ll C = (X + 8) / 9;
    vc<string> ans(H, string(W, '0'));
    if(C == 1){
        if(H == 1 and W == 1){
            cout << X << endl;
            return 0;
        }

        ll dh = (H % 3 == 0 ? 1 : 0), dw = (W % 3 == 0 ? 1 : 0);
        for (ll h = dh; h < H; h+=3){
            for (ll w = dw; w < W; w+=3){
                ans[h][w] = '0' + X;
            }
        }
    }else if(C == 2){
        if(!((H % 3 == 2 and W % 3 != 0) or (W % 3 == 2 and H % 3 != 0))){
            cout << -1 << endl;
            return 0;
        }

        ll a = 9, b = X - 9;
        // err(a, b);
        for (ll h = 0; h < H; h+=3){
            for (ll w = 0; w < W; w+=3){
                if(H % 3 == 2)
                    ans[h][w] = '0' + a, ans[h + 1][w] = '0' + b;
                else
                    ans[h][w] = '0' + a, ans[h][w + 1] = '0' + b;
            }
        }

    }else{
        if(H % 3 != 2 or W % 3 != 2){
            cout << -1 << endl;
            return 0;
        }

        ll a = 9, b = 9, c = (X - 18) / 2, d = X - a - b - c;
        for (ll h = 0; h < H; h += 3){
            for (ll w = 0; w < W; w+=3){
                ans[h][w] = '0' + a, ans[h + 1][w] = '0' + b, ans[h][w + 1] = '0' + c, ans[h + 1][w + 1] = '0' + d;
            }
        }
    }

    rep(i, H) cout << ans[i] << '\n';
}