Hi Hello  Thanks Thank-you  Bye Goodbye (one space between pairs, two spaces between every pairs) In a user's input sentence example as follows: Hi there, Thanks, Bye using the above given pairs as a dictionary to replace corresponding words in the input sentence, and the output becomes: Hello there, Thank-you, Goodbye Read input from user, first word pairs, then the sentence, split, loop over elements to replace what's entered from pair words into entered sentence.  Comments are very important so I can understand. Thanks

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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# python demo script to illustrate dictionary usage to replace words in a sentence
Input is word pairs exactly with same whitespaces as here: 


Hi Hello  Thanks Thank-you  Bye Goodbye

(one space between pairs, two spaces between every pairs)
In a user's input sentence example as follows:

Hi there, Thanks, Bye

using the above given pairs as a dictionary to replace corresponding words in the input sentence, and the output becomes:
Hello there, Thank-you, Goodbye

Read input from user, first word pairs, then the sentence, split, loop over elements to replace what's entered from pair words into entered sentence. 
Comments are very important so I can understand. Thanks

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