#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;   }   