Write a Python program in which the user enters either $\text{'}$A$\text{'},\text{'}$a$\text{'},\text{'}$B$\text{'},\text{'}$b$\text{'},\text{'}$C$\text{'}$ or $\text{'}$c$\text{'}.$ If $\text{'}$A$\text{'}$ or $\text{'}$a$\text{'}$ is entered,

the program should display the word 'Apple'; if $\text{'}$B$\text{'}$ or $\text{'}$b$\text{'}$ is entered, it displays 'Banana'; and if $\text{'}$C$\text{'}$ or

$\text{'}$c$\text{'}$ is entered, it displays 'Coconut'. Use nested if statements for this as depicted in Figure $1$ or in

slides. The first line should print out a title that says something like $$Problem E: Practice using

Nested If statements$.$ If the user enters an invalid input, the program should print $$INVALID

INPUT$.$

Hint: You may want to use the $$upper$$ or $$lower$$ function

Example$1($shell$)$:

$------$Problem E: Practice using Nested If statements$------$

Enter $\text{'}$A$\text{'}$ for apple, $\text{'}$B$\text{'}$ for banana, and $\text{'}$C$\text{'}$ for coconut: a

Apple