为什么一直会报错啊 forgot a comma

为什么python会报错啊，按照标准答案进行编程的，检查过好多遍都没有问题

少了右括号

myName = input("Please input your name(last,first):").strip()
myBirthday = input("Please input your birthday(mm/dd/yyyy):").strip()
myUserName = input("Please input your user name with 3 characters:").strip()
myCourse = input("Please input your course:").strip()
myBook = input("Please input your book(title,publisher,year):").strip()

birthMonth = int(myBirthday.split("/")[0])
birthDay = int(myBirthday.split("/")[1])
birthYear = int(myBirthday.split("/")[2])
print(birthYear, birthMonth, birthDay)