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