H_W = list(map(int,input().split()))
N = int(input())
data = [input().split() for l in range(N)]
s = [0,0]
for i in range(N-1,-1,-1):
        if data[i][0] == 'R' and int(data[i][1]) == s[1]:
                s[0] = s[0]-1 if s[0] > 0 else H_W[1]-1

        elif data[i][0] == 'C' and int(data[i][1]) == s[0]:
                s[1] = s[1]-1 if s[1] > 0 else H_W[0]-1


print('white') if (s[0]+s[1])%2 == 0 else print('black')