import sys
input=lambda: sys.stdin.readline().rstrip()
h,w=map(int,input().split())
n=int(input())
S=[tuple(input().split()) for _ in range(n)]
x,y=0,0
for s,k in S[::-1]:
  if s=="R" and x==int(k):
    y-=1
    if y<0:
      y+=w
  if s=="C" and y==int(k):
    x-=1
    if x<0:
      x+=h
if (x+y)%2==0:
  print("white")
else:
  print("black")