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search for keyword in subsequent lines and delete the second line

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# 1  
Old 08-21-2009
search for keyword in subsequent lines and delete the second line
I have my data something like this

I need to search for the keyword yyyy in the susequent lines and if it is present, delete the second line with keyword.

In other words, if a keywords is found in two subsequent lines delete the second line.

input data:
Code:
aaaa bbbbb cccc dddd
xxxx yyyy xxxxx abc
xxxx yyyy xxxxx xyz
aaaa bbbbb cccc dddd
rrrrrrrrr ttttttt yyyy
xxxx yyyy xxxx
aaaa bbbbb cccc dddd

Code:
output expected:
aaaa bbbbb cccc dddd
xxxx yyyy xxxxx abc
aaaa bbbbb cccc dddd
rrrrrrrrr ttttttt yyyy
xxxx yyyy xxxx
aaaa bbbbb cccc dddd

# 2  
Old 08-21-2009
shouldn't the output be this?
Code:
aaaa bbbbb cccc dddd
xxxx yyyy xxxxx abc
aaaa bbbbb cccc dddd
rrrrrrrrr ttttttt yyyy
aaaa bbbbb cccc dddd

# 3  
Old 08-21-2009
Yes..You are correct!

output expected is

Code:
aaaa bbbbb cccc dddd
xxxx yyyy xxxxx abc
aaaa bbbbb cccc dddd
rrrrrrrrr ttttttt yyyy
aaaa bbbbb cccc dddd

# 4  
Old 08-21-2009
Should be something like this:

Code:
awk '/yyyy/ && NR!=n {n=NR+1}
/yyyy/ && n==NR {next}
{print}' file

# 5  
Old 08-21-2009
That worked Perfect!

thanks
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