#include <iostream>

using namespace std;

int main() {
    int n, m;
    cin >> n >> m;
    int mx[n][m];
    int cnt = 0;
    for (int i = 1; i <= n; ++i) {
        for (int j = (m - 1 + i % 2) % m; 0 <= j && j < m; j += (i % 2) * 2 - 1) {
            mx[i - 1][j] = ++cnt;
        }
    }
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m; ++j) {
            cout << mx[i][j] << " ";
        }
        cout << "\n";
    }
}