#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(W==1 && H==1){
    if(X<=9){
      cout << X << endl;
    }else{
      cout << -1 << endl;
    }
  }
  else if(W==1 && H==2){
    if(X<=18){
      int a, b;
      if(X == 18) a = b = 9;
      else{
        a = X%9;
        b = X - a;
      }
      cout << a << endl;
      cout << b << endl;
    }else{
      cout << -1 << endl;
    }
  }
  else if(W==2 && H==1){
    if(X<=18){
      int a, b;
      if(X == 18) a = b = 9;
      else{
        a = X%9;
        b = X - a;
      }
      cout << a << b << endl;
    }else{
      cout << -1 << endl;
    }
  }
  else {
    if(X > 36 || W%3!=2 || H%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;
}