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