#include <bits/stdc++.h>
char s[1010];
int main() {
  while (~scanf("%s", s)) {
    int m;
    scanf("%d", &m);
    int len = strlen(s);
    int n = len / m;
    int ans = 0;
    if (len % m != 0) {
      printf("NO\n");
      continue;
    }
    for (int i = 0; i < len; i += n) {
      for (int j = 0; j <= n / 2; j++) {
        if (s[i + j] != s[i + n - j - 1]) {
          ans = 1;
          break;
        }
      }
    }
    if (ans == 1)
      printf("NO\n");
    else
      printf("YES\n");
  }
  return 0;
}

### Prompt

Please formulate a Cpp solution to the following problem:

While Mike was walking in the subway, all the stuff in his back-bag dropped on the ground. There were several fax messages among them. He concatenated these strings in some order and now he has string s.

<image>

He is not sure if this is his own back-bag or someone else's. He remembered that there were exactly k messages in his own bag, each was a palindrome string and all those strings had the same length.

He asked you to help him and tell him if he has worn his own back-bag. Check if the given string s is a concatenation of k palindromes of the same length.

Input

The first line of input contains string s containing lowercase English letters (1 ≤ |s| ≤ 1000).

The second line contains integer k (1 ≤ k ≤ 1000).

Output

Print "YES"(without quotes) if he has worn his own back-bag or "NO"(without quotes) otherwise.

Examples

Input

saba
2


Output

NO


Input

saddastavvat
2


Output

YES

Note

Palindrome is a string reading the same forward and backward.

In the second sample, the faxes in his back-bag can be "saddas" and "tavvat".

### Response

```cpp
#include <bits/stdc++.h>
char s[1010];
int main() {
  while (~scanf("%s", s)) {
    int m;
    scanf("%d", &m);
    int len = strlen(s);
    int n = len / m;
    int ans = 0;
    if (len % m != 0) {
      printf("NO\n");
      continue;
    }
    for (int i = 0; i < len; i += n) {
      for (int j = 0; j <= n / 2; j++) {
        if (s[i + j] != s[i + n - j - 1]) {
          ans = 1;
          break;
        }
      }
    }
    if (ans == 1)
      printf("NO\n");
    else
      printf("YES\n");
  }
  return 0;
}

```