class stack(object):
 stack_struct = []

 def read(self):
 if self.stack_struct:
 return self.stack_struct.pop()
 else:
 return "There is no content in stack"

 def write(self, content):
 self.stack_struct.append(content)

 def empty(self):
 self.stack_struct = []

 def Judge_plalindrome(self, string):
 self.empty()
 i = 1
 for letter in string:
 if i <= len(string) / 2:
 self.write(letter)
 elif i % 2 == 0:
 right_string = string[-i:]
 break
 else:
 print(i)
 right_string = string[-i + 1:]
 break
 i += 1
 print("left string is {0}".format(self.stack_struct))
 print("right string is {0}".format(right_string))
 for letter in right_string:
 if self.read() != letter:
 return False
 return True


if __name__ == '__main__':
 stack_obj = stack()
 string = "12235111253221"
 print(stack_obj.Judge_plalindrome(string))

 string = "123454321"
 print(stack_obj.Judge_plalindrome(string))