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:
def friendsCount(arr, k):
    friends = 0
    fedor = arr[len(arr)-1]
    for i in range(0,len(arr)-1):
        xor = fedor ^ arr[i]
        diffBits = 0
        while(1):
            if xor == 0:
                break
            if xor % 2 == 1:
                diffBits = diffBits + 1
            xor = xor//2
        if diffBits <= k:
            friends = friends + 1
    print(friends)
    
    
    
    
nmk = list(map(int, input().strip().split()))
arr = []
for i in range(0,nmk[1]+1):
    scratch = int(input())
    arr.append(scratch)
friendsCount(arr, nmk[2])