H, W = map(int, input().split())
N = int(input())
R = range(N)
S = [input().split() for _ in R]
p = [0, 0]
for i in R:
    j = N-i-1
    a = int(S[j][1])
    s = S[j][0]
    if s == 'C' and p[1] == a:
        b = p[0]-1
        if b<0:b=H-1
        p[0] = b
    elif s == 'R' and p[0] == a:
        b = p[1]-1
        if b<0:b=W-1
        p[1] = b
print('black' if (p[0]+p[1])%2 else 'white')