$ count

0123456789
$

 ,   do,    
number.   ,  1  number   
.        ,  , -
         . 
$(...)            -
 ( ).     number. 
      ,    -
  0  1  ,        (1). -
      number.  done 
     while,    .
  echo    count    
 NEWLINE,        
(     9).

 spell_check

 aspell         .  -
 -1  aspell    :     -
 ,         -
.         

letter.txt:

$ aspell -1 < letter.txt

  , spell_check,   
 while.         
spell_check,         
 aspell,   - :      -
  ,       aspell.  
      ,     -
,     .

   spell_check      
aspell,       .

 spell_check   ,   : 
     ,       .
  if ,     ,  
 if ,      ,  
. (       ; -
 -   test ,     .  
 ,      .)

$ cat spell check

#!/bin/bash

#       aspell

if [ $# - 2 ]
then

 28.   Bourne Again Shell                                883