h, w = map(int, input().split())
n = int(input())
P = []
for _ in range(n):
    s, k = input().split()
    P.append((s, int(k)))

ci, cj = 0, 0
for i in range(n - 1, -1, -1):
    s, k = P[i]
    if s == 'R' and ci == k:
        cj = (cj - 1) % h
    elif s == 'C' and cj == k:
        ci = (ci - 1) % w
if (ci + cj) % 2 == 0:
    print("white")
else:
    print("black")