Square a snowflake

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Problem

Print this square snowflake, made by repeatedly putting an X in every space with exactly one X among its eight neighbors.

https://codegolf.stackexchange.com/questions/204624/square-snowflake

-xnor

Options

exec is denied

rejudge feature is enabled

now post-mortem time, all source codes will be revealed

Sample input:_

*NOTHING*

Sample output:

XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX
XX   X   X   X   X   X   X   X   X   X   X   X   X   X   X   XX
X XXXX   XXXXX   XXXXX   XXXXX   XXXXX   XXXXX   XXXXX   XXXX X
  XX       X X   X X       X X   X X       X X   X X       XX  
X X XXX XXXX       XXXX XXXX       XXXX XXXX       XXXX XXX X X
XXX XX   X X X   X X X   X X X   X X X   X X X   X X X   XX XXX
X   X XXXX XXX   XXX XXXXX XXX   XXX XXXXX XXX   XXX XXXX X   X
      XX               X X   X   X   X X               XX      
X   X X XXX XXX XXX XXXX               XXXX XXX XXX XXX X X   X
XXX XXX XX   X   X   X X X   X   X   X X X   X   X   XX XXX XXX
X X X   X XXXX   XXXXX XXX XXX   XXX XXX XXXXX   XXXX X   X X X
  XXXXX   XX       X X   X X X   X X X   X X       XX   XXXXX  
X X   X X X XXX XXXX   XXXXX       XXXXX   XXXX XXX X X X   X X
XXXX XX XXX XX   X X X X   X X   X X   X X X X   XX XXX XX XXXX
X       X   X XXXX XXX XX XXXX   XXXX XX XXX XXXX X   X       X
              XX                               XX              
X       X   X X XXX XXX XXX XXX XXX XXX XXX XXX X X   X       X
XXXX XX XXX XXX XX   X   X   X   X   X   X   XX XXX XXX XX XXXX
X X   X X X X   X XXXX   XXXXX   XXXXX   XXXX X   X X X X   X X
  XXXXX   XXXXX   XX       X X   X X       XX   XXXXX   XXXXX  
X X X   X X   X X X XXX XXXX       XXXX XXX X X X   X X   X X X
XXX XXX XXXX XX XXX XX   X X X   X X X   XX XXX XX XXXX XXX XXX
X   X X X       X   X XXXX XXX   XXX XXXX X   X       X X X   X
      XXXXX XXX       XX               XX       XXX XXXXX      
X   X X   X X X X   X X XXX XXX XXX XXX X X   X X X X   X X   X
XXX XXXX XXXX   XXX XXX XX   X   X   XX XXX XXX   XXXX XXXX XXX
X X X       X X X X X   X XXXX   XXXX X   X X X X X       X X X
  XXXXX   XXXXX   XXXXX   XX       XX   XXXXX   XXXXX   XXXXX  
X X   X   X   X X X   X X X XXX XXX X X X   X X X   X   X   X X
XXXX XXX XXX XX XXXX XX XXX XX   XX XXX XX XXXX XX XXX XXX XXXX
X               X       X   X XXX X   X       X               X
                              XXX                              
X               X       X   X XXX X   X       X               X
XXXX XXX XXX XX XXXX XX XXX XX   XX XXX XX XXXX XX XXX XXX XXXX
X X   X   X   X X X   X X X XXX XXX X X X   X X X   X   X   X X
  XXXXX   XXXXX   XXXXX   XX       XX   XXXXX   XXXXX   XXXXX  
X X X       X X X X X   X XXXX   XXXX X   X X X X X       X X X
XXX XXXX XXXX   XXX XXX XX   X   X   XX XXX XXX   XXXX XXXX XXX
X   X X   X X X X   X X XXX XXX XXX XXX X X   X X X X   X X   X
      XXXXX XXX       XX               XX       XXX XXXXX      
X   X X X       X   X XXXX XXX   XXX XXXX X   X       X X X   X
XXX XXX XXXX XX XXX XX   X X X   X X X   XX XXX XX XXXX XXX XXX
X X X   X X   X X X XXX XXXX       XXXX XXX X X X   X X   X X X
  XXXXX   XXXXX   XX       X X   X X       XX   XXXXX   XXXXX  
X X   X X X X   X XXXX   XXXXX   XXXXX   XXXX X   X X X X   X X
XXXX XX XXX XXX XX   X   X   X   X   X   X   XX XXX XXX XX XXXX
X       X   X X XXX XXX XXX XXX XXX XXX XXX XXX X X   X       X
              XX                               XX              
X       X   X XXXX XXX XX XXXX   XXXX XX XXX XXXX X   X       X
XXXX XX XXX XX   X X X X   X X   X X   X X X X   XX XXX XX XXXX
X X   X X X XXX XXXX   XXXXX       XXXXX   XXXX XXX X X X   X X
  XXXXX   XX       X X   X X X   X X X   X X       XX   XXXXX  
X X X   X XXXX   XXXXX XXX XXX   XXX XXX XXXXX   XXXX X   X X X
XXX XXX XX   X   X   X X X   X   X   X X X   X   X   XX XXX XXX
X   X X XXX XXX XXX XXXX               XXXX XXX XXX XXX X X   X
      XX               X X   X   X   X X               XX      
X   X XXXX XXX   XXX XXXXX XXX   XXX XXXXX XXX   XXX XXXX X   X
XXX XX   X X X   X X X   X X X   X X X   X X X   X X X   XX XXX
X X XXX XXXX       XXXX XXXX       XXXX XXXX       XXXX XXX X X
  XX       X X   X X       X X   X X       X X   X X       XX  
X XXXX   XXXXX   XXXXX   XXXXX   XXXXX   XXXXX   XXXXX   XXXX X
XX   X   X   X   X   X   X   X   X   X   X   X   X   X   X   XX
XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX

Ranking

Ruby _

Rank	User	Size	Time	Date	Statistics
1	clock	104	2.2781	2020/05/26 02:14:44	0B / 40B / 61B

Ruby2 _

Rank	User	Size	Time	Date	Statistics
1	clock	106	2.2086	2020/05/26 02:13:44	0B / 40B / 63B
2	rotary-o	111	0.6346	2020/05/25 23:04:43	0B / 37B / 70B

Perl _

Rank	User	Size	Time	Date	Statistics
1	tails	100	0.6211	2020/05/14 07:35:38	0B / 40B / 60B

Python _

Rank	User	Size	Time	Date	Statistics
1	clock	127	2.4614	2020/05/21 00:26:12	0B / 67B / 53B
2	hallvabo	128	0.2729	2020/05/16 06:23:57	0B / 67B / 55B
3	xnor	129	0.3626	2020/05/27 03:49:52	0B / 72B / 49B
4	McBusLuck	168	0.6296	2020/05/14 02:25:54	0B / 89B / 58B
5	lynn(cheat,tails)	112	0.7334	2020/12/18 02:49:23	16B / 59B / 32B
6	clock(hallvabo)	125	2.4740	2020/05/27 16:25:20	0B / 69B / 50B
7	rolf	369	0.7025	2020/06/05 07:26:12	0B / 172B / 103B

C _

Rank	User	Size	Time	Date	Statistics
1	tails	129	0.0166	2020/05/17 23:07:15	0B / 67B / 62B
2	chocobi	198	0.0168	2020/05/14 08:21:07	0B / 94B / 104B
3	sadakiyo	1856	0.0134	2020/05/14 06:25:08	145B / ?B / ?B

bc _

Rank	User	Size	Time	Date	Statistics
1	McBusLuck	2462	0.0069	2020/05/14 01:08:08	0B / 1119B / 209B

gs2 _

Rank	User	Size	Time	Date	Statistics
1	tails	38	0.7866	2020/05/26 14:43:51	16B / 13B / 7B

Scala _

Rank	User	Size	Time	Date	Statistics
1	clock	135	2.6280	2020/05/26 21:29:14	6B / 61B / 63B

Language Ranking_

Rank	Lang	User	Size	Score
1	gs2	tails	38	10000
2	Perl	tails	100	3800
3	Ruby	clock	104	3653
4	Ruby2	clock	106	3584
5	Python	lynn(cheat,tails)	112	3392
6	C	tails	129	2945
7	Scala	clock	135	2814
8	bc	McBusLuck	2462	154

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