using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        n = c[0];
        var map = new int[n][];
        for (var i = 0; i < n; ++i) map[i] = new int[n];
        map[0][0] = 1;
        map[n-1][n-1] = 1;
        WriteLine(DFS(0, 0, map) ? "Yes" : "No");
    }
    static int n;
    static int[][] move = new int[][] { new int[] { -1, 0 }, new int[] { 1, 0 }, new int[] { 0, -1 }, new int[] { 0, 1 } };
    static bool DFS(int i, int j, int[][] map)
    {
        if (i + 1 == n && j + 1 == n) return true;
        foreach (var m in move)
        {
            var ni = i + m[0];
            var nj = j + m[1];
            if (ni < 0 || ni >= n || nj < 0 || nj >= n) continue;
            if (map[ni][nj] == 0)
            {
                WriteLine($"{ni + 1} {nj + 1}");
                var s = ReadLine();
                if (s == "Black") map[ni][nj] = 1;
                else map[ni][nj] = 2;
            }
            if (map[ni][nj] == 1)
            {
                if (DFS(ni, nj, map)) return true;
            }
        }
        return false;
    }
}