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

(let (
      (foo (symbol->string (read)))
      (bar (list 0 0))
      (i 0)
     )
  (let loop(
            (baz (list->string (list (string-ref foo 0))))
           )
    (begin
      (cond
        ((string=? baz "N") (set! bar (list (list-ref bar 0) (+ (list-ref bar 1) 1))))
        ((string=? baz "E") (set! bar (list (+ (list-ref bar 0) 1) (list-ref bar 1))))
        ((string=? baz "W") (set! bar (list (- (list-ref bar 0) 1) (list-ref bar 1))))
        ((string=? baz "S") (set! bar (list (list-ref bar 0) (- (list-ref bar 1) 1))))
      )
      (if (= i (- (string-length foo) 1))
          (System.out.println (sqrt (+ (expt (list-ref bar 0) 2) (expt (list-ref bar 1) 2))))
          (begin
            (set! i (+ i 1))
            (loop (list->string (list (string-ref foo i))))
          )
      )
    )
  )
)