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