filtering spam with chinese Subject (2)

Hi,

I tried to filter spam with chinese characters in the Subject:

:0D
* Subject:[^$pat]*[$pat][$pat][$pat]
spam

where:
pat=' ¡¥¦¨©ª¬­®¯±´µ¶·¸º¾¿ÀÁÂÃÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕ×ØÙÚÛÝÞàáâãæçèéêëìíîïðñòóôõ÷ùúûýþÿ'

I thought of searching for at least 3 bad characters in a row.
Unfortunately it doen't work. I found out, that it works, if
I search only for one character:

:0D
* Subject:[^$pat]*[$pat]
spam

but this is a bit too picky IMO.

Why does the pattern [$pat][$pat][$pat] not work? -- Or in other
words: is there something like \{3,} in procmail to repeat patterns?

-- 
   Johannes
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