h,w = map(int, raw_input().split())
k = int(raw_input())
l = [raw_input() for _ in range(k)]
x = 0
y = 0
i = k-1
while i >= 0:
    c = l[i][0]
    j = int(l[i][2:])
    if c == 'R' and y == int(j):
        x = (x+w-1) % w
    elif c == 'C' and x == int(j):
        y = (y+h-1) % h
    i -= 1
if (x+y) % 2 == 0:
    print 'white'
else:
    print 'black'