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Pig, mail # user - Please help with grouped count

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Please help with grouped count
Mark 2012-05-11, 00:23
We have logs in the following format

us, foo
us, foo
fr, fizz
us, bar
fr, baz
fr, fizz
us, foo
fr, fizz

Where the first column is a country and the second column is a search term.

How in the world can I output the country followed by the top terms in
order of occurrence... ie:

us, (foo, bar)      # Top term for 'us' is foo then bar then ...
fr, (fizz, baz)      # Top term for 'fr' is fizz then baz then ...