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 CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, m, k, i, a[1001], ans = 0, j, c;
  vector<int> v[1001];
  cin >> n >> m >> k;
  for (i = 0; i <= m; i++) {
    cin >> a[i];
    while (a[i] > 0) {
      if (a[i] % 2)
        v[i].push_back(1);
      else
        v[i].push_back(0);
      a[i] /= 2;
    }
  }
  for (i = 0; i < m; i++) {
    int r = min(v[i].size(), v[m].size());
    int x = max(v[i].size(), v[m].size());
    c = 0;
    for (j = 0; j < r; j++)
      if (v[i][j] != v[m][j]) c++;
    if (v[m].size() > r) {
      for (j = r; j < x; j++)
        if (v[m][j]) c++;
    } else {
      for (j = r; j < x; j++)
        if (v[i][j]) c++;
    }
    if (c <= k) ans++;
  }
  cout << ans << endl;
  return 0;
}