Groups of repeating items

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DECLARE @ table(i int identity, v varchar(20))
INSERT @ values(1),(1),(1),(3),(3),(1),(1),(2),(2),(2),(1),(1),(3)

SELECT REPLICATE(v+' ',count(*))FROM(SELECT i,i-row_number()over(partition
by v order by i)x,v FROM @)z GROUP BY x,v ORDER BY max(i)

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