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

(define (find-vec vec foo)
  (let loop(
            (i 0)
           )
    (if (= i (- (vector-length vec) 1))
        -1
        (if (= foo (vector-ref vec i))
            i
            (loop (+ i 1))
        )
    )
  )
)

(define (ItemCheckA vec i)
  (let loop(
            (foo (read))
            (bar 0)
            (PowUp 0)
           )
    (if (eof-object? foo)
        PowUp
        (if (> (find-vec vec foo) -1)
            (begin
              (vector-set! vec (+ i bar) 0)
              (vector-set! vec (find-vec vec foo) 0)
              (loop (read) (+ bar 1) (+ PowUp 1))
            )
            (begin
              (vector-set! vec (+ i bar) foo)
              (loop (read) (+ bar 1) PowUp)
            )
        )
    )
  )
)

(define (ItemCheckB vec)
  (let loop(
            (i     0)
            (Cnt   0)
            (PowUp 0)
           )
    (if (= i (- (vector-length vec) 1))
        PowUp
        (if (< 0 (vector-ref vec i))
            (begin
              (vector-set! vec i 0)
              (if (= Cnt 4)
                  (loop (+ i 1) 0 (+ PowUp 1))
                  (loop (+ i 1) (+ Cnt 1) PowUp)
              )
            )
            (loop (+ i 1) Cnt PowUp)
        )
    )
  )
)
            
            

(let loop(
            (vec (make-vector (* (read) 3)))
            (i     0)
            (PowUp 0)
           )
    (if (> i (vector-length vec))
        (System.out.println PowUp)
        (loop vec (+ i 3) (+ PowUp (ItemCheckA vec i) (ItemCheckB vec)))
    )
)