#include <stdio.h>
#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000000



int main(){
	
	int W,H,X;
	cin>>W>>H>>X;
	
	if(W%3!=2||H%3!=2){
		cout<<-1<<endl;
		return 0;
	}
	
	if(X>36){
		cout<<-1<<endl;
	}
	
	vector<int> cnt(4,0);
	rep(i,4){
		if(X<=9){
			cnt[i] = X;
			break;
		}
		else{
			cnt[i] = 9;
			X -= 9;
		}
	}
	
	vector<string> ans(H,string(W,'0'));
	
	rep(i,H){
		rep(j,W){
			int x = i%3,y = j%3;
			
			if(x<=1&&y<=1){
				ans[i][j] = '0' + (cnt[x*2+y]);
			}
		}
	}
	
	rep(i,H){
		cout<<ans[i]<<endl;
	}
	
    return 0;
}