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

#ifdef _RUTHEN
#include <debug.hpp>
#else
#define show(...) true
#endif

using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); i++)
template <class T> using V = vector<T>;

void solve() {
    int H, W;
    cin >> H >> W;
    auto f = [&](int i, int j) -> int { return (i % 2 == 0 ? i * W + j + 1 : i * W + W - j); };
    rep(i, H) rep(j, W) cout << (j % 2 == 1 ? f(H - 1 - i, j) : f(i, j)) << " \n"[j == W - 1];
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int tt = 1;
    while (tt--) solve();
    return 0;
}