#include <iostream>

using std::cin;
using std::cout;

int main()
{
    int nn, mm;
    cin >> nn >> mm;
    int a[20][20];
    int *pp;
    int cnt = 1;
    for (int ii = 0; ii < nn; ++ii) {
        if (ii % 2 == 0) {
            pp = *a + ii * mm;
            for (int j = 0; j < mm; ++j) {
                *pp = cnt;
                ++cnt;
                ++pp;
            }
        } else {
            pp = *a + ii * mm + mm - 1;
            for (int j = 0; j < mm; ++j) {
                *pp = cnt;
                ++cnt;
                --pp;
            }
        }
    }
    int *ans = *a;
    for (int i = 0; i < nn; ++i) {
        for (int j = 0; j < mm; ++j) {
            if (*ans < 100) {
                if (*ans >= 10) {
                    cout << " ";
                } else {
                    cout << "  ";}
            }
            cout << *ans << ' ';
            ++ans;}
        cout << '\n';}
    return 0;
}