#!/usr/bin/python3
"""
    Askisi 2
"""

def is_palindrome(s):
    return s==s[::-1]

def palindrome_keys(d):
    keys=[]
    for key,value in d.items():
        if isinstance(value, str) and is_palindrome(value):
            keys.append(key)
    return keys

def main():
    my_dict={
        "k1":"mama",
        "k2":"noon",
        "k3":"anna",
        "k4":"python",
        "k5":"12321",
        "k6":"apple",
    }

    result=palindrome_keys(my_dict)
    print("Κλειδιά με παλίνδρομες τιμές: ", result)



if __name__=="__main__":
    main()