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>
int a[25];
int main() {
  int n, k, m, i, f, ff, ans = 0, x;
  scanf("%d %d %d", &n, &m, &k);
  for (i = 0; i < m + 1; i++) scanf("%d", &a[i]);
  for (i = 0; i < m; i++) {
    x = a[i];
    int c, co = 0, q, qq;
    for (c = 31; c >= 0; c--) {
      f = x >> c;
      ff = a[m] >> c;
      if (f & 1)
        q = 1;
      else
        q = 0;
      if (ff & 1)
        qq = 1;
      else
        qq = 0;
      if (q != qq) co++;
    }
    if (co <= k) ans++;
  }
  printf("%d", ans);
  return 0;
}