solve this code in python3 paste with proper intendent blocks by pressing (CTRL+SHIFT+V),Also please provide code screenshot,

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Question:

solve this code in python3 paste with proper intendent blocks by pressing (CTRL+SHIFT+V),Also please provide code screenshot, Thank you.

please dont use any built in function.

QUESTION:

As you are a student of university now, you need to ensure your assignments
are plagiarism-free. To do this, you decide to design a simple plagiarism
checker. Your checker will take 2 strings as input. Then it will compare
the 2 strings and check how many words they have in common. Then, print the
percentage in common, by calculating:

(No. of words in common / (No of words in string 1 + No of words in string
2)) * 100.

If the calculated plagiarism is greater than or equal to 30%, print
“Plagiarism detected.” Otherwise, print “Good job!”.
Note: you need to compare “words” not individual characters. You can
consider that all characters in both inputs will be in only lowercase or
uppercase.
=====================================================
Sample Input 1:
my dog’s name is bob
bob is my dog’s name

Sample Output 1:
Common percentage: 50%
Plagiarism detected.
Explanation 1:
Length of string1= 5, Length of string2= 5, number of common words= 5.
Hence, common percentage= (5/(5+5))*100 = 50