#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin >> n;
  char a[2] = {'W', 'B'};
  for (int i = 0; i < n; ++i) {
    for (int j = 0; j < n; ++j) {
      cout << a[(i + j + !(n & 1)) & 1];
    }
    cout << '\n';
  }
  return 0;
}
