#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int INF=2147483647;
int inf=-2147483648;
int mod=1000000007;
#define read(x) cin >> x;
#define fo(i,n) for(i=0;i<n;i++)
#define one(x) cout<<(x)<<endl;
#define two(a,b) cout<<(a)<<" "<<(b)<<endl;
#define three(a,b,c) cout<<(a)<<" "<<(b)<<" "<<(c)<<endl;
#define four(a,b,c,d) cout<<(a)<<" "<<(b)<<" "<<(c)<<" "<<(d)<<endl;
#define write(a,i) cout << a[i] << " ";
int main()
{
    int n,x,uk=0,i,k;
   cin >> n >> x;int a[n];
   for (i=0;i<n;i++)
   {
       cin >> a[i];
       for (k=0;k<i;k++)
          //if ((a[i]^a[k]==x) && (sos[i]!=1) && (sos[k]!=1)) { sos[i]=1;sos[k]=1;uk++; }
          //cout << a[i] << " " << a[k] << " " << (a[i]^a[k]) << endl;
          if ((a[i]^a[k])==x) uk++;
   }
   cout << uk;
    return 0;
}