SUPyF2 Dictionaries-Lab - 04. Odd Occurrences

"""
Dictionaries - Lab
Check your code: https://judge.softuni.bg/Contests/Practice/Index/1736#3

SUPyF2 Dictionaries-Lab - 04. Odd Occurrences

Problem:
Write a program that extracts all elements from a given sequence of words that are present
in it an odd number of times (case-insensitive).
• Words are given on a single line, space separated.
• Print the result elements in lowercase, in their order of appearance.

Examples:
Input                                   Output
Java C# PHP PHP JAVA C java             java c# c
3 5 5 hi pi HO Hi 5 ho 3 hi pi          5 hi
a a A SQL xx a xx a A a XX c            a sql xx c
"""
# My way of doing things complicated :D :
# words = [word.lower() for word in input().split()]
# print(*{word: words.count(word) for word in words if words.count(word) % 2 != 0}.keys())

words = input().split()

dictionary = {}

for word in words:
    lower_word = word.lower()
    if lower_word not in dictionary:
        dictionary[lower_word] = 0
    else:
        dictionary[lower_word] += 1

for key, value in dictionary.items():
    if value % 2 == 0:
        print(key, end=" ")