def main():
    H, W = map(int, raw_input().split())
    N = input()
    H, W, M = H-1, W-1, N-1
    S = ['' for x in range(N)]
    K = [0 for x in range(N)]
    for i in range(N):
        s = raw_input().split()
        S[i] = s[0]
        K[i] = int(s[1])
    y=x=c=0
    for i in range(N):
        c = M-i
        if S[c] == 'C':
            if K[c] == x:
                y += -1 if y else H
        else:
            if K[c] == y:
                x += -1 if x else W
    print('black' if (y+x)%2 else 'white')
if __name__ == '__main__':
    main()