#include <bits/stdc++.h>
using namespace std;
int n, m;
int a[105][105];
int main() {
  scanf("%d %d", &n, &m);
  if (n + m == 3 or n + m == 4)
    printf("-1\n");
  else {
    int num = 2;
    if (n >= m) {
      for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++) {
          if (num > m * n) num = 1;
          a[i][j] = num;
          num += 2;
        }
    } else
      for (int j = 1; j <= m; j++)
        for (int i = 1; i <= n; i++) {
          if (num > m * n) num = 1;
          a[i][j] = num;
          num += 2;
        }
    for (int i = 1; i <= n; i++)
      for (int j = 1; j <= m; j++) {
        printf("%d", a[i][j]);
        if (j == m)
          printf("\n");
        else
          printf(" ");
      }
  }
  return 0;
}
