#include <bits/stdc++.h>
using namespace std;
vector<long long int> v, v1, v2, v3;
string s1, s2, s3;
int main() {
  long long int a[100001] = {0}, b[100001], c = 0, d = 0, i, j, k = 0, l = 0, m,
                n, p = 0, q, t, ct = 0, ct1 = 0, ct2 = 0, ck = 0, ck1 = 0,
                ck2 = 0, ln, ln1, start, end, mid;
  long long int a1 = 0, a2 = 0, a3 = 0, a4 = 0, sum = 0, sum1 = 0, max1, max2,
                min1, min2;
  double x, y, z;
  char s[1101], st[1001], ch, ch1, ch2;
  cin >> n;
  cin >> c >> d;
  k = max(c - 1, d - 1);
  p = max(n - c, n - d);
  if (k <= p)
    cout << "white";
  else
    cout << "black";
  return 0;
}
