Corpora: line joining

[Tony Berber Sardinha]

Dear members

I need to fix an output from a tagger and join consecutive lines of text, so
that, for example, this:

de    PREP
a   ART

turns into this:

da    CPR

Does anyone know how to do this in sed or perl?

thanks ahead

cheers
tony.
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Dr Tony Berber Sardinha
Catholic University of Sao Paulo, Brazil
tony4 at uol.com.br
www.tonyberber.f2s.com