h,w = map(int,input().split())
n = int(input())
res = [input().split() for _ in range(n)]
x = y = 0
for a,b in res[::-1]:
    if a=="C" and y == int(b):
        x = (x-1)%h
    if a=="R" and x == int(b):
        y = (y-1)%w
print("black" if (x+y)%2 else "white")