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.*;

public class p9{
	public static void main(String [] args) throws Exception{
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		String [] g = in.readLine().split(" ");
		int n = Integer.parseInt(g[0]);
		int m = Integer.parseInt(g[1]);
		int k = Integer.parseInt(g[2]);
		int ans = 0;
		int [] nums = new int[m];
		for(int i=0; i<m; i++) nums[i] = Integer.parseInt(in.readLine());
		int f = Integer.parseInt(in.readLine());
		//System.out.println(f);
		for(int i=0; i<m; i++){
			int test = (f^nums[i]);
			int c = 0;
			for(int o=0;o<n; o++){
				int a = 1<<o;
				if((test&a)!=0) c++;
			}
			//System.out.println(nums[i] +" "+ test+" "+c);
			if(c<=k) ans++;
		}
		System.out.println(ans);
	}
}