Across the nightmare

(‚`)
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9-----7---------4-----5---------
9-----7---------4-----5---------
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9-----7---------4---------------
9-----7---------4-----5---------
----------------------5---------
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(‚a)
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9-----7---------4-----5---------
9-----7---------4-----5---------
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9-----7---------4-----3-----2---
9-----7---------4-----3-----2---
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(‚b)
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7---9---7---9---7---9-7-----9---
7---9---7---9---7---9-7-----9---
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--------------------------------
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7-----7---------9-----9---------
7-----7---------9-----9---------
--------------------------------

(‚c)
------15-12------------------------------------
15c---------15-14-12----14---------14c---------
---------------------14------14-12-------12-14-
-----------------------------------------------
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14c--12-14-12----------12--------14c----
--------------14-12-14------14----------
----------------------------------------
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-----------------------------------
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(‚d)
------------14-12----14-15-14-12----------------
15-13-12-15-------15-------------15-13-12-------
------------------------------------------14-12-
------------------------------------------------
------------------------------------------------
------------------------------------------------

------------------------------------12---------
---------12-14-12----14-13----13-15------------
14----14----------14-------12------------------
---14------------------------------------------
-----------------------------------------------
-----------------------------------------------

(‚e)
------------14-12----14-15-14-15-17-15-14-12----
15-13-12-15-------15-------------------------15-
------------------------------------------------
------------------------------------------------
------------------------------------------------
------------------------------------------------

12-------------------12-------12-14-15--------
---15-14-12----12-14----13-15-----------------
------------14--------------------------------
----------------------------------------------
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(‚f)
------------14-12----14-15-14-15-17-15-14-12----
15-13-12-15-------15-------------------------15-
------------------------------------------------
------------------------------------------------
------------------------------------------------
------------------------------------------------

12-------------------12-----------12-15-------
---15-14-12----12-14----13---15---------------
------------14--------------------------------
----------------------------------------------
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12---10---12---10---12---10---15---13---
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15---13---15---13---12---10---12---10---
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12---10---13---12---13---15-------15---
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-------------------12----------------
15c---------------------12---15---14-
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---14c--14c--------14c-14-12----------
--------------------|___|-------------
---------------------C.D--------------
--------------------------------------

----------------------------------------
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14---14---12-14-----14---14---12-14-----
----------------------------------------
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--------------------------------------
--------------------------------------
12-------------------------------12---
-------14------------------12-14------
----------------------------|_|-------
-----------------------------H--------

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14c-------14c-------14c--12-14-12----------
----------------------------------14-12-14-
-------------------------------------------
-------------------------------------------

------------------------------------------
---------------------------15-------------
12---12---14-----12-14c-------------------
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-----15c-------15---12-------------------
-------------------------12---15---15c---
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----------15-------14-----13-----12---
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12-15-12-12-15-12-12-15-12-12-15-12-12-15-12-15-
------------------------------------------------
------------------------------------------------
------------------------------------------------
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------------------------------------------------

15c------15-------14-15-14-12----------
-------------------|__|__|-------------
--------------------H---P--------------
---------------------------------------
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----------------------------------------
15c------15-------------15--------------
------------------14c--------14c---14---
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---------------------------------------
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12c------------------------12----------
---------14c-------12-14---------------
--------------------|__|---------------
----------------------H----------------

-----------------------------------------
-------------------------15--------------
------12---14---12---14c------14c---12---
12-14------------------------------------
-|__|------------------------------------
---H-------------------------------------

--------------------------------------
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12-----------------12-14---12---------
-----14---12---14---|_|---------------
---------------------H----------------
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------------------17-----18-----19---
17-------20--------------------------
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------------------17c----------------
17-------20--------------20----------
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‰‰‘t‡˜

‚`‚w‚R‚a‚b‚w‚R‚c‚d‚e‚d‚f