import sys
h,w=map(int,input().split())
n=int(input())
d=sys.stdin.read().splitlines()
s=0
t=0
if h==w==1:
    print("white")
else:
    for k in d[::-1]:
            if s == 'R ' + str(t):
                    s= s-1 if s>0 else w-1
            elif k=='R '+str(s):         
                    t= t-1 if t>0 else h-1
    if (s%2==1 and t%2==0) or (s%2==0 and t%2==1):
        print("black")
    else:
        print("white")