thanks bart for ur reply ur code is fine....but actually my problem of pattern matching includes 31(or less) instead of the 4(or less) pairs that as i mentioned in my post. i made the change so as to be able to give an example easily. if i follow ur code pattern then it might turn out to be a bit too long......any shorter version??? thanks again for ur help so far vineet

In reply to Re^3: pattern matching by vineet2004
in thread pattern matching by vineet2004

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