12312 - TF_Bottom3_Python   

Description

Given a few lines of text, you need to parse it and perform the following requirements.
 
In this test, you need to find the top 3 unfrequent words.
 

If there are some words have same frequency, please order them according to the order of occurence.

Input

One or multiple lines of text

Output

Print top 3 unfrequent words from the input text

If there are many words have the same frequency, please order them according to their appearance order.

Sample Input  Download

Sample Output  Download

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