h,w=map(int,input().split())
n=int(input())
sk=[input().split() for _ in range(n)]
i=j=0
for s,k in sk[::-1]:
    k=int(k)
    if s=="R" and i==k:j=(j-1)%w
    if s=="C" and j==k:i=(i-1)%w
if (i+j)&1:print("black")
else:print("white")