Question: Your program will take an input.txt file that has person's last name and their state(2 characters) in US. You need store name and states in

Your program will take an input.txt file that has person's last name and their state(2 characters) in US. You need store name and states in the order of last name. At the end, you must print in the order of state with how many residence in each state. Duplicate names are not allowed within same state

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