def get_students():
    '''return a list of students'''
    students = []

    more_students = True:

    while more_students:
        sid = int(input("Enter ID:"))
        fname = input("Enter first name:")
        lname = input("Enter last name:")
        mark - float(input("Enter mark:"))

        student = [sid, lname, fname, mark]

        students.append(student)

        answer = input("Process another student? (Y/N)")
        if not answer.lower() == 'y':
            more _students = False
    return students
def main():
    students = get_students()

    print("students")
    for s in students:
        print("ID:". s[0])
        print("FN:", s[2])
        print("LN:", s[1])
        print("MK:",s[3])
        print()