#![allow(unused_imports)]
#![allow(non_snake_case, unused)]

fn read() -> Vec<String> {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).unwrap();
    s.trim().split_whitespace().map(|s| String::from(s)).collect()
}

use std::cmp::*;
use std::collections::*;
use std::ops::*;
use std::marker::*;
 
const INF: i64 = std::i64::MAX/100;
const MOD: i64 = 1_000_000_007;
// const MOD: i64 = 998_244_353;

fn main() {
    let (n, m): (usize, usize) = {
        let a = read();
        (a[0].parse().unwrap(), a[1].parse().unwrap())
    };
    let mut seen = vec![vec![false;n];n];
    let mut ans = false;
    dfs(0,0,4,&mut seen,&mut ans);
    if ans {
        println!("Yes");
    }
    else {
        println!("No");
    }
}

fn dfs(x: usize, y: usize, d: usize, mut seen: &mut Vec<Vec<bool>>, mut ans: &mut bool){
    let n = seen.len();
    if x==n-1 && y==n-1 {
        *ans = true;
        return;
    }
    println!("{} {}",x+1,y+1);
    let t = read();
    if t[0]=="White" {
        return;
    }
    seen[x][y] = true;
    let dir = [(0,1),(1,0),(0,!0),(!0,0)];
    for (nd,&(tx,ty)) in dir.iter().enumerate() {
        if d<4 && d!=nd && nd%2==d%2 {
            continue;
        }
        let nx = x + tx;
        let ny = y + ty;
        if nx>=n || ny>=n {
            continue;
        }
        if seen[nx][ny] {
            continue;
        }
        seen[nx][ny] = true;
        dfs(nx,ny,nd,&mut seen,&mut ans);
    }
}