H, W = map(int, raw_input().split())
N = input()
S = [0 for x in range(N)]
K = S[:]
for i in range(N):
    s = raw_input().split()
    S[i] = ord(s[0])-67
    K[i] = int(s[1])
y = x = 0
for i in range(N-1, -1, -1):
    if S[i]:
        if K[i] == y: x = (x-1+W)%W
    else:
        if K[i] == x: y = (y-1+H)%H
print('black' if (y+x)%2 else 'white')