#include <bits/stdc++.h>
using namespace std;

using i64 = long long;

/*#ifndef ONLINE_JUDGE
#include "test.h"
#else
#define debug(...) 42
#define debug_assert(...) 42
#endif*/

void solve() {
    int n;
    cin >> n;

    vector<vector<char>> a(n, vector<char>(n, 'W'));

    for (int i = 0; i < n - 1; i++) {
        for (int j = 0; j <= i; j++) {
            a[i][j] = 'B';
        }
    }

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            cout << a[i][j];
        }
        cout << '\n';
    }
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int t = 1;
    //cin >> t;
    while (t--) {
        solve();
    }
    return 0;
}