`r
```?+`@i`d
	```?+`@i`d
		```?+`@i`d
			```?+`@i.4
			```?-i.2
			i
		```?-i`d
			```?+`@i.2
			```?-i.0
			i
		i
	```?-i`d
		```?+`@i`d
			```?+`@i.2
			```?-i.0
			i
		```?-i`d
			```?+`@i.0
			```?-i`.-.2
			i
		i
	i
```?-i`d
	```?+`@i`d
		```?+`@i`d
			```?+`@i.2
			```?-i.0
			i
		```?-i`d
			```?+`@i.0
			```?-i`.-.2
			i
		i
	```?-i`d
		```?+`@i`d
			```?+`@i.0
			```?-i`.-.2
			i
		```?-i`d
			```?+`@i`.-.2
			```?-i`.-.4
			i
		i
	i
i