Create a function that takes a list of names of superheroes and superheroines and returns a list of only the names of superheroes ending in "man" in alphabetical order.
superheroes(["Batman", "Superman", "Spider-man", "Hulk", "Wolverine", "Wonder-Woman"])
➞ ["Batman", "Spider-man", "Superman"]
superheroes(["Catwoman", "Deadpool", "Dr.Strange", "Captain-America", "Aquaman", "Hawkeye"])
➞ ["Aquaman"]
superheroes(["Wonder-Woman", "Catwoman", "Invisible-Woman"])
➞ []
Wonder-Woman, Catwoman and Invisible-Woman are superheroines.