#include "bits/stdc++.h"
#include <algorithm>
#include <vector>

using namespace std;

#define REP(i, n) for (ll i = 0; i < n; i++)
#define all(v) v.begin(), v.end()
#define ll long long
#define P pair<ll, ll>
#define INF (1ll << 60)
#define ALL(n) (n).begin(), (n).end()
#define FOR(i, a, b) for (int i = (a); i < b; i++)

int main() {
  ll n, k;
  cin >> n >> k;
  vector<ll> ans;
  FOR(i, n * n - k + 1, n * n + 1) ans.push_back(i);
  FOR(i, 1, n * n - k + 1) ans.push_back(i);
  REP(i, n) {
    if (i != 0)
      cout << endl;
    REP(j, n) {
      if (j != 0)
        cout << " ";
      cout << ans[i * n + j];
    }
  }
}