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 PYTHON):

Solution:
import sys
import pdb

lines = list(sys.stdin)
params = lines[0].split(" ")
params = [int(i) for i in params]
k = params[2]
armies = [int(i) for i in lines[1:]]

fedors_army = armies[-1]
other_armies = armies[:-1]

def friendable(army_a, army_b):
    return sum_bits(army_a ^ army_b) <= k

def sum_bits(n):
    acc = 0
    while n != 0:
        acc += n % 2
        n = n >> 1
    return acc

count = 0
for army in other_armies:
    if friendable(fedors_army, army):
        count += 1
print count