class Node:
    def __init__(self,data):
        self.data=data
        self.next=None
class Linkedlist:
    def __init__(self):
        self.head=None
        while(temp):
            print(temp.data)
            temp=temp.next
    def append(self,new_data):
        new_node=Node(new_data)
        if self.head is None:
            self.head=new_data
            return
        last=self.head
        while(last.next):
            last=last.next
        last.next=new_node    
llist1=Linkedlist()
llist1.head=Node(1)
second=Node(2)
third=Node(3)
llist1.head.next=second;
second.next=third;
llist1.append(8)
llist1.printList()    
llist2=Linkedlist()
llist2.append(10)   
llist2.append(20)
llist2.append(30)
llist2.printList()