Write a program that continually queries the user to enter a character and counts the number of times the character $\text{'}a\text{'}$ or $\text{'}A\text{'}$ is entered. When the user enters an $\text{'}x\text{'}$ or $\text{'}x\text{'}$ in response to the query, the program should terminate with the message "The letter $\text{'}a\text{'}$ has been entered: $n$ times." Where $n$ is the number of times the character $\text{'}a\text{'}$ or $\text{'}A\text{'}$ was entered.

Write a program that computes the sum of the first $n$ even integers and the sum of the first $n$ odd integers where $n$ is a value typed by the user. The program should display its finds in an appropriate message.