548_A. Mike and Fax
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.

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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".
```python
def isPalindrome(t):
    for i in range(len(t)//2):
        if t[i] != t[len(t)-i-1]:
            return False
    return True
s = input()
k = int(input())
if len(s) % k:
    print('NO')
else:
    t = len(s)//k
    for i in range(k):
        if not isPalindrome(s[i*t: i*t+t]):
            print('NO')
            break
    else:
        print('YES')

```