import sys
input=sys.stdin.readline

def main():
    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)%h
    if (i+j)&1:print("black")
    else:print("white")

main()