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 JAVA):

Solution:
import java.io.*;
import java.util.*;

public class FedorAndNewGame {
    public static void main(String[] args) throws Exception {
        BufferedReader buffer = new BufferedReader(new InputStreamReader(System.in));
        String [] inp = buffer.readLine().split(" ");
        int n = Integer.parseInt(inp[0]), m = Integer.parseInt(inp[1]), k = Integer.parseInt(inp[2]);
        int cnt = 0;
        int [] arr = new int[m+1];
        for (int pos = 0; pos < m+1; pos++) {
            int x = Integer.parseInt(buffer.readLine());
            arr[pos] = x;
        }
        int fedorArmy = arr[m];
        for (int pos = 0; pos < m; pos++) {
            int xor = fedorArmy^arr[pos];
            int tempCnt = 0;
            for (int bit = 0; bit <= 31; bit++) {
                if (((xor>>bit)&1)!=0)
                    tempCnt++;
            }
            if (tempCnt <= k)
                cnt++;
        }
        System.out.println(cnt);
    }
}