#include <bits/stdc++.h>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;
typedef unsigned long long ull;

int field[1000][1000];

int main(){
  int W, H, X;
  cin >> W >> H >> X;

  if(X > 36 || W%3!=2 || W%3!=2){
    cout << -1 << endl;
    return 0;
  }

  int a,b,c,d;
  if(X == 36){
    a = b = c = d = 9;
  }else{
    a = X%9;
    b = c = d = (X-a)/3;
  }
  
  for(int i=0; i<H; i+=3){
    for(int j=0; j<W; j+=3){
      field[i][j] = a; field[i][j+1] = b;
      field[i+1][j] = c; field[i+1][j+1] = d;
    }
  }

  rep(i,H){
    rep(j,W){
      cout << field[i][j];
    }
    cout << endl;
  }

  
  return 0;
}