#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= n; j++) {
      if (i % 2 == 1) {
        if (j % 2 == 1) {
          cout << "W";
        } else {
          cout << "B";
        }
      } else {
        if (j % 2 == 1) {
          cout << "B";
        } else {
          cout << "W";
        }
      }
    }
    cout << endl;
  }
  return 0;
}
