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