#include <iostream>
#include <iomanip>
#include <algorithm>
#include <array>
#include <vector>
#include <string>
#include <utility>
#include <tuple>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <queue>
#include <deque>
#include <stack>
#include <bitset>
#include <numeric>
#include <random>
#include <functional>
#include <cctype>
#include <cmath>
#include <complex>
#include <ctime>
#include <cassert>
#define rep(i,l,r) for(auto i = (l); i < (r); ++i)
#define drep(i,l,r) for(auto i = (r)-1; i >= (l); --i)
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
using namespace std;
using uint = unsigned int; using ll = long long; using ull = unsigned long long;
using pii = pair<int,int>; using pli = pair<ll,int>; using pil = pair<int,ll>; using pll = pair<ll,ll>;
template<class T> using Pq = priority_queue<T>; template<class T> using pQ = priority_queue<T, vector<T>, greater<T>>;
template<class T, class U> inline bool chmin(T& a, const U& b) { if (a > b) { a = b; return true; } return false; }
template<class T, class U> inline bool chmax(T& a, const U& b) { if (a < b) { a = b; return true; } return false; }
inline void yesno(bool p) { if (p) cout << "Yes\n"; else cout << "No\n"; }
const int INF = numeric_limits<int>::max(); const ll LINF = numeric_limits<ll>::max();

void testcase();

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(20);

    int T = 1;
    // cin >> T;
    rep(i,0,T) testcase();
    return 0;
}

void testcase(){
    int n,m,k;
    cin>>n>>m>>k;
    vector a(n,vector<int>(n));
    int now = 1;
    rep(i,0,k)rep(j,0,k){
        a[i][j] = now;
        now++;
        if(now>m) now = 1;
    } 
    rep(i,0,n)rep(j,0,n) a[i][j] = a[i%k][j%k];
    rep(i,0,n)rep(j,0,n)cout<<a[i][j]<<" \n"[j==n-1];
    return;
}