1 ~ | a |>
	| -> a
| b |>
	| -> b
:@choice = 1

1 ~ | a |>
	| -> a
| b |>
	| -> b
choice = 2

() ~ | a |>
	| -> a
| b |>
	| -> b
choice = 1

| a |>
	| -> a
25 # | b |>
	| -> b
choice = 2

12 # () ~ | a |>
	| -> a
3 # | b |>
	| -> b
choice = 1

12 # 1 ~ | a |>
	| -> a
3 # | b |>
	| -> b
choice = 1