#include <bits/stdc++.h>
using namespace std;
int n, m, i, j, a[505][505], s;
int main() {
  int t;
  int n, m;
  cin >> n;
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++) {
      if ((i + j) & 1)
        cout << "W";
      else
        cout << "B";
    }
    cout << endl;
  }
  return 0;
}
