from collections import deque
import sys

n, m = map(int, input().split())
dist = [[None for _ in range(n)] for _ in range(n)]
dist[0][0] = 0
used = [[None for _ in range(n)] for _ in range(n)]
used[0][0] = False
used[-1][-1] = False

dx = [1, 0, -1, 0]
dy = [0, 1, 0, -1]

gx, gy = n - 1, n - 1

dq = deque()
dq.append((0, 0))
rest = 3000
while len(dq) > 0:
  cx, cy = dq.popleft()

  for i in range(4):
    nx = cx + dx[i]
    if nx < 0 or nx >= n:
      continue
    ny = cy + dy[i]
    if ny < 0 or ny >= n:
      continue
    if not dist[nx][ny] is None:
      continue
    if used[nx][ny] is None:
      if rest <= 0:
        break

      rest -= 1
      print(*[nx + 1, ny + 1], sep=" ")
      sys.stdout.flush()
      t = input()
      if t == "Black":
        used[nx][ny] = False
      elif t == "White":
        used[nx][ny] = True

    if not used[nx][ny]:
      dist[nx][ny] = dist[cx][cy] + 1
      dq.append((nx, ny))

  if not dist[gx][gy] is None:
    print("Yes")
    sys.stdout.flush()
    exit()
  elif rest <= 0:
    break

print("No")
sys.stdout.flush()