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sed to find pattern and delete line before and after

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# 1  
Old 09-24-2010
sed to find pattern and delete line before and after
I have the following file:

line1
line2
MATCH
line3
line4

I need to find the pattern, "MATCH" and delete the line before and after MATCH. So the result should be

line1
MATCH
lline4

I have to use sed because it is the only utility that is common across my environments. I found the following sed command but it does not print the last line of the file.

sed -i.bak -n -e'1h' -e'1!H' -e '/MATCH/{p;n;n;h;d}' -e 1b -e 'x;P' filename
# 2  
Old 09-25-2010
Code:
grep -v "$(grep -C 1 "MATCH" infile)" infile

Code:
awk -v RS='[^\n]*\n*MATCH\n[^\n]*' '{print}' ORS=""  infile

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