#include <bits/stdc++.h>
using namespace std;
priority_queue<int> q;
int main() {
  int n;
  cin >> n;
  for (int i = 0; i < n; ++i) {
    for (int j = 0; j < n; ++j) {
      if ((i + j) & 1)
        printf("W");
      else
        printf("B");
    }
    puts("");
  }
  return 0;
}
