H, W = map(int, input().split())
N = int(input())
S, K = [None] * N, [None] * N
for i in range(N):
    S[i], K[i] = input().split()
    K[i] = int(K[i])

S.reverse()
K.reverse()
x, y = 0, 0
for i in range(N):
    if S[i] == "R" and K[i] == x:
        y = (y - 1)%W
    if S[i] == "C" and K[i] == y:
        x = (x - 1)%H
if (x + y) % 2:
    print("black")
else:
    print("white")