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