please show me step by step python

1) Ask user for input (1 mark) 2) Using one IF statement block (1 mark) a) Determine if input is i) a string greater than 3 characters ( 1 mark) (1) Display a message stating that the string is greater than 3 characters (1 mark) ii) an empty string ( 1 mark) (1) Display a message stating that the string is empty (1 mark) b) If neither of the above cases are true, display message thanking user for input. (1 mark)