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*.

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

The second line contains integer *k* (1 ≤ *k* ≤ 1000).
s = input()
n = int(input())
a = 0

ls = len(s)
b = ls//n
k=0

while b <= ls:
  tmp = s[a:b]
  if tmp[0:len(tmp)//2] == tmp[len(tmp)//2:][::-1]:
    k += 1
  a = b
  b *= 2
  

if k == n:
  print("YES")
else:
  print("NO")
	  	 			 	   			  					 	  				