m = "y"                      # do this  to ask if you want to condinue or not 
while m =="y":
 print("Choose 1 for Append")
 print("Choose 2 for insert")
 print("Choose 3 for append a list to a another list")
 print("Choose 4 to modify element")
 print("Choose 5 to delete a existing element with given value")
 print("Choose 6 to delete a existing element with a given element")
 ch=int(input("Enter your choice"))
 ne=int(input("Enter the number of elements to be entered"))
 l1=[]
 for i in range(ne):
     el=input("Enter the element")
     l1.append(el)
 print(l1)
 if ch ==1:
     el2 = input("ENter the element to be appended")
     l1.append(el2)
     print(l1)
 elif ch==2:
     el3 = input("Enter the element to be inserted ")
     p1 = int(input("Enter the position "))
     l1.insert(p1,el3)
     print(l1)
 elif ch==3:
     l2 = input("Enter the list to be appended")
     l1.append(l2)
     print(l1)
 elif ch==4:
     i=int(input("Enter index of element to modify"))
     el4=input("Enter the new value")
     l1[i]=el4
     print(l1)
 elif ch==5:
     i2 = int(input("Enter the index of the element to be deleted"))
     del l1[i2]
     print(l1)
 elif ch==6:
     el5 = input("Enter the element to be deleted")
     l1.remove(el4)
     print(l1)
 else:
     print("Invalid choice")
 m = input("Do you want to it again, y/n")  # do this  to ask if you want to condinue or not....!