class UserDetail:
    def __init__(self, student_id, student_name, dob, class_std, section, 
                 father_name, mother_name, address, phone, email, blood_group):
        self.student_id = student_id
        self.student_name = student_name
        self.dob = dob
        self.class_std = class_std
        self.section = section
        self.father_name = father_name
        self.mother_name = mother_name
        self.address = address
        self.phone = phone
        self.email = email
        self.blood_group = blood_group
        
    def __str__(self):
        return f"Student ID: {self.student_id}, Name: {self.student_name}, Class: {self.class_std}-{self.section}"