Extract a slice from a list

	;; P18 (**) Extract a slice from a list.
	;; Given two indices, I and K, the slice is the list containing the elements between the I'th and K'th element of the original list (both limits included). Start counting the elements with 1.
	;; Example:
	;; * (slice '(a b c d e f g h i k) 3 7)
	;; (C D E F G)
	(require srfi/1)
	(define (slice lst i k)
	(drop (take lst k) (- i 1)))

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