Combining Cells into Strings

I cannot seem to figure this out and it seems so simple.

In Cell A1 I have the string:

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In cell B1 I want to add a quick formula to combine cell A1 with the letter 'a'. The problem is that it always comes out with a space between 'T2' and 'a'.

Formula in Cell B1:

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The result: T2 a

But I need it to read: T2a

I've tried to use TRIM, CLEAN, and SUBSTITUTE (substitute char(32) for char(160)) but still nothing

is there any way to do this? I will need to repeat this step many times so I'm hoping to use a formula rather than multiple entries