H, W = map(int, input().split())
N = int(input())
S = reversed([input().split() for _ in range(N)])
p = [0, 0]
for i in S:
    a = int(i[1])
    if i[0] == 'C' and p[1] == a:
        b = p[0]-1
        if b<0:b=H-1
        p[0] = b
    if i[0] == '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')