i;h,w;x,y;main(c,r){i--?~scanf("\n%c%d",&c,&r)?main(),c%2?y==r&&(x=(x+h-1)%h):x==r&&(y=(y+w-1)%w):0:main(scanf("%d%d%*d",&h,&w))+puts(x+y&1?"black":"white");}