How can I add blank line to the record using macro

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Friday December 13, 2013
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December 13, 2013
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Hi There,

I am having difficulties with macro, I would like to have macro which checks the records in each row and if they do not match than it adds blank row to the records to separate out 2 records

like example as below

123 abc 4587214
123 xyz 0124
458 vus 02145

When records are not matching than need blank row to the record as below

123 abc 4587214
123 xyz 0124

458 vus 02145

Many Help please?

thank you in advance