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

if __name__ == '__main__':
    main()