#include <bits/stdc++.h>
using namespace std;
using ll=long long;

int main(){
    ll N,M,K; cin>>N>>M>>K;
    if(K*K<M){
        cout<<-1<<endl;
        return 0;
    }
    for(ll i=0;i<N;i++){
        for(ll j=0;j<N;j++){
            cout<<(i*K+(j%K))%M+1;
            if(j==N-1) cout<<endl;
            else cout<<" ";
        }
    }
}