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