help me pls with python

Write a program that prompts the user to enter a sentence



Create a list to store each unique letter in the sentence

Create a second list that stores the number of times each letter appears in the sentence



Print out the letter frequency of each letter



Eg

>Enter a sentence: abracadabra



The letter a appears 5 times

The letter b appears 2 times

The letter r appears 2 times

The letter c appears once

The letter d appears once
I got this so far...