#include <bits/stdc++.h>
#define EPS 1e-7;
using namespace std;
const int N = 100;
int a[N][N];
int main ()
{
    int n, m, i, j, c = 0, t = 1;
    cin >> n >> m;
    for ( i = 1; i <= n; i ++ )
        {
            for ( j = 1; j <= m;  j ++ )
                {
                    a[i][j] = t;
                    t ++;
                }
        }
    for ( i = 1; i <= n; i ++ )
        {
            if ( i % 2 == 0 )
            for ( j = m; j >= 1;  j -- )
                {
                    cout << a[i][j] <<" ";
                }
            else
            for ( j = 1; j <= m;  j ++ )
                {
                    cout << a[i][j] <<" ";
                }
            cout << endl;
        }
    return 0;
}