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grep and fetching lines after grep

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# 1  
Old 07-16-2008
grep and fetching lines after grep
suppose i have a file structure(serial file)--
----------
----------
---------
summery
--------
------
--------
finished
-----
-------
i want to fetch lines from summery to finished
i can get line of summery by grep command. but how can i fetch lines untill it reaches finished.probably i have to use loop..pleaseeeeeeee help...
# 2  
Old 07-16-2008
from grep -n 'summery' a.log
and
grep -n 'finished' a.log----we can get 2 line numbers.now how can i print lines between two line numbers.
# 3  
Old 07-16-2008
Code:
sed -n '/summery/,/finished/p' infile

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