Inserting string representation of key

Hi,

when I use this mapping:

:inoremap <expr> <Right> 'a<Right>a'

and press <Right> in insert mode, it only inserts 'aa'. This seems strange to me, because I'm using a literal string. I want it to insert the whole String 'a<Right>a'.

How can I accomplish my expected behavior?

Thanks in advance.
Felix

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