#include <bits/stdc++.h>
int main() {
  long long int x, y, n, w, b;
  scanf("%I64d", &n);
  scanf("%I64d", &x);
  scanf("%I64d", &y);
  w = (x - 1) + (y - 1);
  b = (n - x) + (n - y);
  if (w <= b)
    printf("white");
  else
    printf("black");
  return 0;
}
