Ticket queue

Problem

Support tickets wait in a queue, each with a number. Build a linked list from the numbers in the order given, then print the list with -> between neighbours.

Input, output and limits

Input: One line of integers separated by spaces.
Output: The ticket numbers joined by -> .
Constraints: 1 ≤ number of values ≤ 10000
1 ≤ each value ≤ 1000000000

Examples

Example

Input

12 7 30

Output

12 -> 7 -> 30

Hints

Try the problem first. Open one hint at a time.

Hint 1

Build the nodes first, then walk them with while node:.

Hint 2

Collect the values in a list and join them with -> .

Write your Python code, run it on the examples and submit it to hidden tests.

Solve in the editor

Order count and totaleasy
First position of an itemeasy
Add to both endseasy
Remove the first matcheasy
Reverse the listeasy

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Input, output and limits

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Problem

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Examples

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