import Deque # i already shared this module
def is_palindrom(string):
    iki_yonlu = Deque()
    for i in string.lower():
        iki_yonlu.add_front(i) # you can add i in iki_yonlu using iki_yonlu.add_rear(i)
    stat = True
    while iki_yonlu.size()>1 and stat:
        front_char = iki_yonlu.remove_front()
        end_char = iki_yonlu.remove_rear()
        if front_char != end_char:
            stat = False
    return stat

print(is_palindrom("radar"))
print(is_palindrom("Sore was I ere I saw Eros"))