Hi,

I'm looking for a command to retrieve a block of lines using sed or grep, probably awk if that can do the job.

In below example,
By searching for words "Third line2" i'm expecting to retrieve the full block starting with 'BEGIN' and ending with 'END' of the search.

Example:

BEGIN
Second line
Third line1
Fourth line
END
BEGIN
Second line
Third line2
Fourth line
END
BEGIN
Second line
Third line3
Fourth line
END

Output Expecting:

BEGIN
Second line
Third line2
Fourth line
END

Note: Block line size can vary & each block can have different line sizes from one other.

Thank you