Input Masking in T-SQL while using Select statement

The situation is, i have a table with a column length 6 of Char data type.
But the data will come with any length, i.e., with 4 chars length or 3 chars length..

For Example,
CatName - Length
Dany - 4 Chars
Sam - 3 Chars
Eltone - 6 Chars

In the above sitation, how can i have the data, while fetching with a common legth?

If you use "select replace(space(6-len(CatName))+CatName),' ','X') from table" you will always get the data with fixed length and padded with 'X'

OutPut will be
XXDany
XXXSam
Eltone

One of my major problem is solved...

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