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DECLARE @ INT = ##Size:INT?7##;

SELECT IIF(u IN(1,s),REPLICATE(s,s),CONCAT(s,REPLICATE(' ',s-2*LEN(s)),s))
FROM(SELECT @ s)z CROSS APPLY(SELECT TOP(s)ROW_NUMBER()OVER(ORDER BY 1/0)u FROM sys.messages)v

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edited may 8 16

created may 6 16 anonymous