Question: ( Sorting Letters and Removing Duplicates ) Insert 2 0 random letters in the range ' a ' through ' f ' into a list.

(Sorting Letters and Removing Duplicates) Insert 20 random letters in the range
'a' through 'f' into a list. Perform the following tasks and display your results:
Sort the list in ascending order.
Sort the list in descending order.
Get the unique values sort them in ascending order.

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