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

int main(){
    int w, h, x;
    cin >> w >> h >> x;
    vector<int> B;
    vector<vector<int>> A={{0,1,0},{1,0,0},{1,2,0}};
    vector<string> ans(h, string(w, '0'));
    int ym = h % 3, xm = w % 3;
    int sz = (ym == 2 ? 2 : 1) * (xm == 2 ? 2: 1);
    for(int i = 0; i < sz; i++){
        if(x >= 9)B.push_back(9), x -= 9;
        else B.push_back(x), x = 0;
    }
    if(x != 0){
        cout << -1 << endl;
        return 0;
    }
    for(int y = 0; y < h; y++){
        int ys = A[ym][y % 3] + 2 * (sz == 4 && y % 3 == 1);
        for(int x = 0; x < w; x++){
            int xs = A[xm][x % 3];
            int s = ys * xs;
            if(s == 0)continue;
            ans[y][x] = B[__lg(s)] + '0';
        }
        cout << ans[y] << '\n';
    }
}