// xor.cpp : Defines the entry point for the console application.
//
#include <fstream>
#include <iostream>
#include <algorithm>
using namespace std;

const int MAX = 0x20000;
int N, K, A[MAX], B[MAX];

int main(int argc, char* argv[])
{
    ifstream in;
    in.open("xor.in");
    in >> N >> K;
    if (N < 1 || N > 100000) {
        cerr << "Invalid N" << endl;
        return 1;
    }
    if (K < 0 || K > 100000) {
        cerr << "Invalid K" << endl;
        return 1;
    }
    for (int i = 0; i < MAX; i++)
        A[i] = B[i] = 0;

    for (int i = 0; i < N; i++) {
        int a;
        in >> a;
        if (a < 0 || a > 100000) {
            cerr << "Invalid Ai" << endl;
            return 1;
        }
        A[a]++;
        if (K != 0) {
            B[a ^ K]++;
        }
    }
    in.close();

    int c = 0;
    for (int i = 1; i <= 100000; i++)
    {
        c += K != 0 ? A[i] * B[i] : (A[i] * (A[i] - 1)) / 2;
    }

    ofstream out;
    out.open("xor.out");
    out << (K == 0 ? c  : c / 2) << endl;
    out.close();
	return 0;
}