(define (not_ item)
   (
      cond ((EQ? item #f) #t)
            ( #t #f)


    )
)

(define (and_  item1 item2)

     (cond ((EQ? item1 #f) #f)
           ((EQ? item2 #f) #f)
     (#t #t)
     )

)

(define (or_ item1 item2)
        ( not_ (and_ (not_ item1) (not_ item2) ) )

)
; list length
(define (count_ lst len)

 (cond ((EQV? lst '() ) len  )
        ((not_ (PAIR? lst)) len )
        ( (= 1 1)  (
                    count_ (cdr lst  ) (+ len 1)
                          ))))
; reverse list
(define (reverse_ list_  result  position )
    (define len  ( count_ list_ 0) )
    (cond ((= len 0)  result  )
          ( (and_ (= position 1  ) (and_ (PAIR?  list_) (LIST? list_)) )

                            (cons  (car list_)  result ) )
             ( (and_  (= position 1  ) (and_ (PAIR?  list_) (not_ (LIST? list_))) )

                          (cons   list_   result ) )
             ( (= 1 1)
                        (reverse_ (cdr list_) (cons (car list_) result  )  ( - position 1) )
                     )
     )
)
; check second part for different issues
(define (check li copy possible_pair_position deep)
       (define len  ( count_ li 0) )
     ;  (display len)
      (cond ((= len 0 )  copy  )
            ( (and_ (=  possible_pair_position 1  ) (and_ (PAIR?  li) (LIST? li)) )

                         (reverse_ (cons  (car li)  copy ) '() deep)     )
             ( (and_ (and_ (=  possible_pair_position 1  )  (PAIR?  li)) (not_ (LIST? li)) )

                         (reverse_ (cons   li   copy ) '() deep)  )
           ( (=  possible_pair_position 1  )

             (cons  (car li) copy ) )
           ((= 1 1)

      (check (cdr li  ) (cons (car li) copy )   (- possible_pair_position 1) deep )
            )
       )

 )
;second part formatting
(define (second my_list)
     (define len  ( count_ my_list 0) )
     (cond ((< len 2) "less than 2")
           ((= len 2) '() )
           ((= 1 1) ( check (cddr my_list) '()  (- len 2) (- len 2) )
                           )
           )

  )

;first part formatting
(define (first my_list)

     (cond ((and_  (not_ (LIST? my_list)) (not_ (PAIR? my_list))) "atom" )
           (( and_ (=( count_ my_list 0) 1)  (and_ (PAIR? my_list) (not_ (LIST? my_list))) ) "pair"  )
           ((< ( count_ my_list 0) 2) "list size less than 2"  )
           ((= ( count_ my_list 0) 2)
                                       (cond ((and_ (not_ (LIST? my_list)) (PAIR? my_list) )
                                              (cons (car my_list) (cons ( cdr my_list) '()))

                                              )
                                       ((= 1 1)
                                               (cons (car my_list) (cons ( cadr my_list) '() ))
                                               )
                                             )                  )
           ((> ( count_ my_list 0) 2)
                                    (cons (car my_list) (cons ( cadr my_list) '() ) )

            )

                    ((= 1 1)  '(car my_list)

                           )
           )


  )
(define (combine_parts  first_part x)

(cond ( (EQ? first_part "atom" )

          "atom"
        )
      ((EQ? first_part "list size less than 2")  "list size less than 2" )
      ((= 1 1)

              (cons first_part (cons  (second x) '() ))

       )
)


  )
(define (create_new item )
     (combine_parts  (first  item) item)

 )