h, w = map(int,input().split())
n = int(input())
l = [input().split() for _ in range(n)]

x = y = 0
for s, k in l[::-1]:
    k = int(k)
    if s == 'R' and k == y:
        x = (x-1) % w
    elif s == 'C' and k == x:
        y = (y-1) % h

print('white' if (x+y) % 2 == 0 else 'black')