def main():
    H, W = map(int, raw_input().split())
    N = int(raw_input())
    R = xrange(N)
    H, W, N = H-1, W-1, N-1
    S = [raw_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' and x == a:
            b = y-1
            if b<0:b=H
            y = b
        elif s == 'R' and y == a:
            b = x-1
            if b<0:b=W
            x = b
    print('black' if (y+x)%2 else 'white')

if __name__ == '__main__':
    main()