class Employee:
    def __init__(self, firstname, lastname, salary):
        self.firstname = firstname
        self.lastname = lastname
        self.salary = salary

    @classmethod
    def from_string(cls, my_dash):
        my_result = my_dash.split("-")
        return cls(firstname = my_result[0], lastname = my_result[1], salary = int(my_result[2]))


emp1 = Employee.from_string("John-Agyei-5000")

print(emp1.lastname)
print(emp1.salary)