#include<bits/stdc++.h>
using namespace std;
//#define int long long
#define REP(i,m,n) for(int i=(m);i<(n);i++)
#define rep(i,n) REP(i,0,n)
#define pb push_back
#define all(a) a.begin(),a.end()
#define rall(c) (c).rbegin(),(c).rend()
#define mp make_pair
#define endl '\n'
#define vec vector<ll>
#define mat vector<vector<ll> >
#define fi first
#define se second
#define double long double
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll,ll> pll;
//typedef long double ld;
typedef complex<double> Complex;
const ll INF=1e9+7;
const ll inf=INF*INF;
const ll mod=1e9+7;
const ll MAX=140010;



signed main(){
    ll w,h,x;cin>>w>>h>>x;
    vector<vector<ll> >ans(h+1,vector<ll>(w+1));
    if(h==1){
        if(x>18){
            cout<<-1<<endl;
        }else if(x>9){
            vector<ll>ans(w);
            ans[0]=9;
            ans[1]=x-9;
            REP(i,3,w){
                ans[i]=ans[i-3];
            }
            rep(i,w)cout<<ans[i];
            cout<<endl;
        }else{
            vector<ll>ans(w);
            ans[0]=x;
            REP(i,3,w){
                ans[i]=ans[i-3];
            }
            rep(i,w)cout<<ans[i];
            cout<<endl;
        }
    }else if(w==1){
        swap(h,w);
        if(x>18){
            cout<<-1<<endl;
        }else if(x>9){
            vector<ll>ans(w);
            ans[0]=9;
            ans[1]=x-9;
            REP(i,3,w){
                ans[i]=ans[i-3];
            }
            rep(i,w)cout<<ans[i]<<endl;
            cout<<endl;
        }else{
            vector<ll>ans(w);
            ans[0]=x;
            REP(i,3,w){
                ans[i]=ans[i-3];
            }
            rep(i,w)cout<<ans[i]<<endl;
            cout<<endl;
        }
    }else{
        if(x>36||(h%3!=2)||(w%3!=2)){
            cout<<-1<<endl;
        }else{
            vector<vector<ll> >ans(h,vector<ll>(w));
            if(x>9){
                ans[0][0]=9;
                x-=9;
            }else{
                ans[0][0]=x;
                x=0;
            }
            if(x>9){
                ans[1][0]=9;
                x-=9;
            }else{
                ans[1][0]=x;
                x=0;
            }
            if(x>9){
                ans[0][1]=9;
                x-=9;
            }else{
                ans[0][1]=x;
                x=0;
            }
            if(x>9){
                ans[1][1]=9;
                x-=9;
            }else{
                ans[1][1]=x;
                x=0;
            }
            rep(i,2){
                REP(j,3,w){
                    ans[i][j]=ans[i][j-3];
                }
            }
            REP(i,3,h){
                rep(j,w){
                    ans[i][j]=ans[i-3][j];
                }
            }
            rep(i,h){
                rep(j,w){
                    cout<<ans[i][j];
                }
                cout<<endl;
            }
        }
    }
}