Hello teacher, I tried a code for the below problem statement. (Write a program that accepts a comma-separated sequence of words as input and prints the words in a comma-separated sequence after sorting them alphabetically.) My code is below .But I got None as output. code: words=input("Enten words:") a=words.split(",") b=a.sort() print(b) But again I wrote the code as below. And I got an answer. words=input("Enten words:") a=words.split(",") a.sort() print(a) so could you please tell me what is difference between these codes? And why it does not give me the output in 1st program.