from sys import exit

__author__ = 'Zlobober'
s = raw_input()
k = int(raw_input())
n = len(s)
if len(s) % k != 0:
    print "NO"
else:
    for i in range(k):
        if s[i * (n // k) : (i + 1) * (n // k)] != ''.join(reversed(s[i * (n // k) : (i + 1) * (n // k)])):
            print "NO"
            exit(0)
    print "YES"