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#lang racket
; load word list from this file
(define DICTIONARY "wordsEn.txt")
; test if _str_ contains the character _char_
(define (string-contains? str char)
(lambda (return)
(for ([c (in-string str)])
(when (eq? c char)
(return #t)))
; find all words containing _chars_ with _length_ characters
(define (words-containing chars [length (length chars)])
(with-input-from-file DICTIONARY
(lambda ()
(for/list ([word (in-lines)]
#:when (and (= length (string-length word))
(andmap (lambda (c) (string-contains? word c)) chars)))
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