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searching for multiple rows in the correct sequence in a file

pcomb
pcomb asked
on
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Last Modified: 2015-04-05
I need to search a file for certain patterns in a particular order and print out rows i.e.
Find rows with value WORD1 then find ROW with WORD2 if found before next ccurence of WORD1 print word 2

eg
word1
word2
word1
would cause word2 to be printed
word1
word2
word2
word2
would cause the first occurence of word2 to be printed but not the next 2 occurences.

Its a file in Linux but I am open to using windows programming if necessary
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