import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
 
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
 
        int n = scanner.nextInt();
        long k = scanner.nextLong();
        long[] arr = new long[n];
 
        for (int i = 0; i < n; i++) {
            arr[i] = scanner.nextLong();
        }
 
        Map<Long, Long> freqMap = new HashMap<>();
        freqMap.put(0L, 1L);
 
        long xorSum = 0, count = 0;
 
        for (long num : arr) {
            xorSum ^= num;
            count += freqMap.getOrDefault(xorSum ^ k, 0L);
            freqMap.put(xorSum, freqMap.getOrDefault(xorSum, 0L) + 1);
        }
 
        System.out.println(count);
    }
}
 

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