(define (System.out.println x)
  (begin
    (display x)
    (newline)
  )
)

(let (
      (A (sort (string->list (symbol->string (read))) (lambda (x y) (< (char->integer x) (char->integer y)))))
      (B (sort (string->list (symbol->string (read))) (lambda (x y) (< (char->integer x) (char->integer y)))))
     )
  (if (string=? (list->string A) (list->string B))
      (System.out.println "YES")
      (System.out.println "NO")
  )
)