#include <bits/stdc++.h>
#include <atcoder/modint>
using namespace std;
using namespace atcoder;
//#pragma GCC optimize("Ofast")
#define reps(i,s,n) for(int i = s; i < n; i++)
#define rep(i,n) reps(i,0,n)
#define Rreps(i,n,e) for(int i = n - 1; i >= e; --i)
#define Rrep(i,n) Rreps(i,n,0)
#define ALL(a) a.begin(), a.end()

using ll = long long;
using vec = vector<ll>;
using mat = vector<vec>;

ll N,M,H,W,Q,K,A,B;
string S;
using P = pair<ll, ll>;
using tp = tuple<ll, ll, ll>;
const ll INF = (1LL<<60);

template<class T> bool chmin(T &a, const T b){
    if(a > b) {a = b; return true;}
    else return false;
}
template<class T> bool chmax(T &a, const T b){
    if(a < b) {a = b; return true;}
    else return false;
}
template<class T> void my_printv(std::vector<T> v,bool endline = true){
    if(!v.empty()){
        for(std::size_t i{}; i<v.size()-1; ++i) std::cout<<v[i]<<" ";
        std::cout<<v.back();
    }
    if(endline) std::cout<<std::endl;
}

void yn(bool yes){
    cout<<(yes ? "Yes" : "No")<<endl;
    exit(0);
}

bool ask_white(int i, int j){
    cout<<i + 1<<' '<<j + 1<<endl;
    string s;
    cin>>s;
    if(s == "-1") exit(1);
    return s == "White";
}

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cin>>N>>M;
    const vector<int> di = {-1, 0, 1, 0}, dj = {0, -1, 0, 1};
    mat G(N, vec(N, -1));
    G[0][0] = 0;
    auto dfs = [&](auto &&self, int i, int j) -> void{
        if(i == N - 1 && j == N - 1) yn(true);
        rep(k, 4){
            int ni = i + di[k], nj = j + dj[k];
            if(ni >= 0 && ni < N && nj >= 0 && nj < N){
                if(G[ni][nj] == -1){
                    G[ni][nj] = ask_white(ni, nj);
                    if(G[ni][nj] == 0) self(self, ni, nj);
                }
            }
        }
    };
    dfs(dfs, 0, 0);
    yn(false);
}