#include <bits/stdc++.h>
int main() {
  int n;
  scanf("%d", &n);
  for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= n; j++) {
      if ((i + j) % 2)
        printf("B");
      else
        printf("W");
    }
    printf("\n");
  }
  return 0;
}
