Create a doubly linked list. (till the input is -999, we can enter the nodes)

Add 3 elements at the beginning of the linked list. (If less than 3 elements are entered, the program should give Error message as output.)

Display the elements of the resulting doubly linked list in reverse order.

Sample Input/Output

Input

10 20 15 45 -999

-2 5 8

Output

45 15 20 10 -2 5 8

Input

84 19 32 45 25 39 -999 

15

Output

Error!! Three elements must be inserted.