src file contain all the code required to execute the project successfully. 
The "main.py" is the main file that needed to be executed, rest all other
files are supporting files. 
word_replacer.py -> module help create the sentence perturbation by replacing
	words with their synonym or antonyms or word shuffling.
utils.py -> it is utility file, help to read and write the files.
sentence_encoder.py -> contains all the sentence encoder functions. 
