#include<iostream>
#include<math.h>
#include<algorithm>
#include<stdint.h>
#include<vector>
#include<deque>
#include<stack>
#include<functional>
#include<string>
#include<numeric>
#include<cstring>
#include<random>
#include<array>
#include<fstream>
#include<iomanip>
#include<list>
#include<set>
#include<map>
#include<unordered_map>
#include<unordered_set>
#include<bitset>
#include<queue>

/*
#include<boost/multiprecision/cpp_int.hpp>
using namespace boost::multiprecision;
*/

using namespace std;

using ll = long long;
using ull = unsigned long long;

#define REP(i,a,b) for(ll i = a; i < b; ++i)
#define PRI(s) std::cout << s << endl
#define PRIF(v, n) printf("%."#n"f\n", (double)v)

template<typename A, typename B>void mins(A& a, const B& b) { a = min(a, (A)b); };
template<typename A, typename B>void maxs(A& a, const B& b) { a = max(a, (A)b); };



int main() {
	ll N, X, Y; cin >> N >> X >> Y;
	vector<ll> A(N+1);
	vector<ll> P;
	A[0] = X;
	REP(i, 1, N+1) cin >> A[i];
	reverse(A.begin(), A.end());
	ll a = Y;
	ll b = ~Y;
	REP(i, 0, N) {
		if ((~A[i] & a) == 0) {
			if ((b & A[i]) == 0) {
				P.push_back(3);
				while (P.size() != N) P.push_back(1);
				reverse(P.begin(), P.end());
				for (ll p : P) cout << p << " ";
				cout << endl;
				return 0;
			}

			b = b & A[i];
			P.push_back(1);
		}
		else if ((b & A[i]) == 0) {
			a = a & ~A[i];
			P.push_back(2);
		}
		else {
			PRI(-1);
			return 0;
		}
	}
	PRI(-1);
	return 0;
}