Problem: After you had helped George and Alex to move in the dorm, they went to help their friend Fedor play a new computer game «Call of Soldiers 3».

The game has (m + 1) players and n types of soldiers in total. Players «Call of Soldiers 3» are numbered form 1 to (m + 1). Types of soldiers are numbered from 0 to n - 1. Each player has an army. Army of the i-th player can be described by non-negative integer xi. Consider binary representation of xi: if the j-th bit of number xi equal to one, then the army of the i-th player has soldiers of the j-th type. 

Fedor is the (m + 1)-th player of the game. He assume that two players can become friends if their armies differ in at most k types of soldiers (in other words, binary representations of the corresponding numbers differ in at most k bits). Help Fedor and count how many players can become his friends.

Input

The first line contains three integers n, m, k (1 ≤ k ≤ n ≤ 20; 1 ≤ m ≤ 1000).

The i-th of the next (m + 1) lines contains a single integer xi (1 ≤ xi ≤ 2n - 1), that describes the i-th player's army. We remind you that Fedor is the (m + 1)-th player.

Output

Print a single integer — the number of Fedor's potential friends.

Examples

Input

7 3 1
8
5
111
17


Output

0


Input

3 3 3
1
2
3
4


Output

3

Solution (in PYTHON3):

Solution:
# -*- coding: utf-8 -*-

import sys

def count_bits_set(n):
    bits_set = 0
    while n > 0:
        bits_set += n & 1
        n = n >> 1
    return bits_set

def test_count_bits_set():
    import random
    for i in range(1000):
        n = random.randint(0,10000)
        if count_bits_set(n) != bin(n).count("1"):
            print(n)

def main():
    n, m, k = map(int, input().split())
    armies = []
    friends = 0
    for i in range(m):
        armies.append(int(input()))
    target = int(input())
    for i in range(m):
        diff_bits = count_bits_set(target ^ armies[i])
        if diff_bits <= k:
            friends += 1
        #if (bin(armies[i] ^ target).count("1") <= k):
        #    friends += 1
    
    print(friends)


if __name__ == '__main__':
    main()