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merging two files based on some key

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# 1  
Old 02-03-2006
merging two files based on some key
I have to merge two files:
The files are having the same format like
A0this is first line
TOlast line

silmilarly other lines.
I have to search for A0 line in the second file also and then put the data in the third file under A0 heading ,then for A1 and so on.
A0 portion will be treminated by Tno.where no is the total no of lines under A0 int filnal third file, similarly for A1 heading and so on
# 2  
Old 02-03-2006
your description about the requirement and the problem you face is confusing and contradicting between statements

can u post the sample input and sample output
that would be helpful to proceed.
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