#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
    int n, m;
    cin >> n >> m;
    int arr[100][100];
    int k = 1;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (i % 2 == 0) {
                arr[i][j] = k;
                k++;
            }
            else if (i % 2 != 0) {
                arr[i][m - 1 - j] = k;
                k++;
            }
        }
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cout << setw(4) << arr[i][j];
        }
        cout << endl;
    }
    return 0;
}