string = input().lower()
size = len(string)
if size%2==0:
  strn=''
  for i in range(int(size/2)):
    strn+=string[i]
  if strn+strn[::-1]==string:
    print("It's a palindrome")
  else:
    print("It's not a palindrome")
else:
  strn=''
  for i in range(int(size/2)):
    strn+=string[i]
  if strn+string[i+1]+strn[::-1]==string:
    print("It's a palindrome")
  else:
    print("It's not a palindrome")