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From: "Roland Reichenberg" <r.reichenberg@gmx.de>
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Subject: how to flush lines that do NOT include characters 'FK'
Date: Thu, 7 Aug 2003 13:41:17 +0200
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Hi NG,

in my buffer, I want to flush all lines that do NOT contain the letters "FK"

My buffer contains lots of lines like:
laksjdfh
oqwirutz
095876
mxvb
aelkdjfFKddd
dffff
kkkkss
kkssss
aeskldjfopqirt
iquirmvqkrik
owuiertznvc
q9prskladhf
FK_hhh20894
1s9845FK01
095678jf
ajfhlakjdfh

>>From these lines I want to filter the follwing
aelkdjfFKddd
FK_hhh20894
1s9845FK01

Any suggestions for a REGEXP?

I have tried the following:
M-x flush-lines [^FK]

But without success.

Who can help?

Thanks in advance,

        Roland