h,w=map(int,raw_input().split())
n=input()
x=0
y=0
for sk in[raw_input().split()for i in xrange(n)][::-1]:
	#print sk,x,y
	k=int(sk[1])
	if ord(sk[0])==82:
		if y==k:
			x=(x-1+w)%w
	elif x==k:
		y=(y-1+h)%h
print["white","black"][x&1^y&1]