01204212/statuses

You are given an information on comments are posted. You want to print out a report on that in a nicely form.

Input

• First line: integer n (the number of comments)
• The next n lines, each line specify a comment. Line i + 1 for 1<=i<=n specifies the i-th comment. In this line, there is an integer p (p < i) and a string s (consiting of a - z and an underline (_) whose length is at most 30). This comment replies to the p-th comment. If p=0, this comment replies to the status itself. The string s is the comment text.

Input example

7
0 hello_world
0 this_is_another_comment
1 first_reply
2 good_morning_thailand
1 second_one
1 third_one
5 when_it_is_ok

For this input, the expected report would be (see the description of the output at the end):

- 1 hello_world
  - 3 first_reply
  - 5 second_one
    - 7 when_it_is_ok
  - 6 third_one
- 2 this_is_another_comment
  - 4 good_morning_thailand