human
What is a Python program to print a single integer — the number of Fedor's potential friends given the following:
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
Solve the task in PYTHON3.
assistant
#Here is Python program to print a single integer — the number of Fedor's potential friends.

def main():
    n, m, k = map(int, input().split())

    a = []
    for _ in range(m):
        a.append(int(input()))
        
    f = int(input())
    
    def bitcnt(i):
        c = 0
        while i:
            i &= i - 1
            c += 1
        return c

    res = 0
    for ai in a:
        if bitcnt(ai ^ f) <= k:
            res += 1
    print(res)

if __name__ == '__main__':
    main()