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

(let (
      (foo (string-append (symbol->string (read)) (symbol->string (read))))
     )
  (let loop(
            (i 0)
            (Vacation 0)
            (MaxVac 0)
           )
    (if (= i 14)
        (System.out.println MaxVac)
        (if (string=? (list->string (list (string-ref foo i))) "o")
            (if (< MaxVac (+ Vacation 1))
                (loop (+ i 1) (+ Vacation 1) (+ Vacation 1))
                (loop (+ i 1) (+ Vacation 1) MaxVac)
            )
            (loop (+ i 1) 0 MaxVac)
        )
    )
  )
)