h, w = map(int, input().split())
n = int(input())
sk = [input().split() for _ in range(n)]
i = j = 0
for s, k in sk[::-1]:
    k = int(k)
    if s == "R" and k == i:
        j = (j - 1) % w
    elif s == "C" and k == j:
        i = (i - 1) % h
if (i + j) % 2 == 0:
    print("white")
else:
    print("black")