


article = """Natural language processing (NLP) is a subfield of linguistics, computer science, information engineering, and artificial intelligence concerned with the interactions between computers and human (natural) languages, in particular how to program computers to process and analyze large amounts of natural language data.

Challenges in natural language processing frequently involve speech recognition, natural language understanding, and natural-language generation.
"""
print(article)


"""
title
1st, Nova Robert, 450
2nd, Smart Maker, 405
3rd, Robert Master, 340
end.
"""

# to replace 11 to xx
str1 = 'abc11abc'
str1 = str1.replace('11','xx')
print(str1)

# to replace 11 to empty string ''
str1 = 'abc11abc'
str1 = str1.replace('11','')
print(str1)
