#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define M 1000000000
#define MAX 20000000000 
#define set_zero(a) memset(a,0,sizeof(a))
#define N 100005
using namespace std;
void solve(ll tc){
   string s; cin>>s;
   ll n = s.length();
   bool ok = false;
   ll j = -1;
   for(ll i = 0;i<n;i++){
      if(s[i] == '.'){
         ok = true;
         j = i;
         break;
      }
   } 
   if(ok){
      for(ll i = 0;i<j;i++) cout<<s[i];
      cout<<endl;
   }
   else cout<<s<<endl;
}
int main(){
   ios_base::sync_with_stdio(false);
   cin.tie(NULL); cout.tie(NULL);
   ll t = 1 ;// cin>>t;
   ll tc = 0;
   while(t--){
       tc++;
       solve(tc);
   }
   return 0;
}
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef pair<int, int> pii;

#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define COUT(x) cout << (x) << endl
#define PB push_back
#define SZ(x) ((int)(x).size())
#define F first
#define S second
#define MOD 1000000007

const vector<int> DX = {1, -1, 0, 0};
const vector<int> DY = {0, 0, 1, -1};

template<typename T>
void pv(const vector<T> &vec) {
  for (auto x : vec) {
    cout << x << ' ';
  }
  cout << '\n';
}
/*
--------------------------------------------------------
*/





int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);

  int n;
  cin >> n;
  if (n % 2) {
    cout << "Black" << endl;
  } else {
    cout << "White" << endl;
  }
  return 0;
  

}