class student:
    def __init__(self):
        self.usn= None
        self.name=None
        self.branch=None
        self.phno=None
    def read(self):
        self.usn=input("enter the  usn: ")
        self.name=input("enter the name: ")
        self.branch=input("enter the branch: ")
        self.phno=input("enter the phno: ")

    def display(self):
        print(f'n{self.usn}  {self.name}  {self.branch}   {self.phno}n')
print(f'nusn %name branch phnon')
n=int(input("enter number of students : "))
for i in range(n):
    emp=student()
    emp.read()
print("nusn   name branch phnon")

for i  in student():

    emp[i].display()

for i  in student():
    emp[i].display()