WHY?

The reason this happens:

In notepad, any other 4-3-3-5 letter word combo will have the same results.
It is all to do with a limitation in Windows. Text files containing Unicode UTF-16-encoded Unicode are supposed to start with a "Byte-Order Mark" (BOM), which is a two-byte flag that tells a reader how the following UTF-16 data is encoded.

1) You are saving to 8-bit Extended ASCII (Look at the Save As / Encoding format)
2) You are reading from 16-bit UNICODE (You guessed it, look at the Save As / Encoding format)
This is why the 18 8-bit characters are being displayed as 9 (obviously not supported by your codepage) 16-bit UNICODE characters

Notepad Trick ! for complete list move to NOTEPAD TRICKS page

Step 1: Open Notepad
Step 2: Write following line in the notepad.
this pgm will chang
Step 3: Save this file as a.txt
Step 4: Close the notepad.
Step 5: Open the file again.

Remove Stored username and Passwords !

To remove the Stored User Names and Passwords from your system, try this:
Click Start, Run and type Control keymgr.dll
Remove the entries from the list.
The other ways to access this dialog are:
Type Control Userpasswords2 in RUN box, click Advanced, Manage Passwords
-or-
From Control Panel, select your User Account, click Manage your network passwords

Hiding Content of Web Site

If you are serious about hiding contents follow the 6 point program below.

1. Take it down from the publicly available internet location.
2. Turn off the computer with the original files.
3. Remove the harddrive.
4. Destroy the harddrive by using a 18 LB sledge hammer.
5. Bury the remains in a land fill.
6. Have hypnosis to remove any traces of memory of the above.