; variables
(defparameter *str_a* "")
(defparameter *str_b* "")

; functions
(defun input-strings ()
  (setf *str_a* (read-line))
  (setf *str_b* (read-line))
)

(defun check-same-str-p (str1 str2)
  (equal
    (sort (coerce str1 'list) #'char-lessp)
    (sort (coerce str2 'list) #'char-lessp))
)

(defun n69 ()
  (input-strings)
  (if (check-same-str-p *str_a* *str_b*)
    (princ "YES")
    (princ "NO")
    )
)

(n69)