How do I do ALT signs on Habbo Hotel?

[DragoZeroOne]

I've been searching for it, then I found the list of it but then Ill try and it won't come up! I think it's because of my Keyboard, it's Logitech and mostly signs have different codes! I know that because I found some of them by trying o.o Can someone tell me what numbers should I use to make all of them? IN HABBO HOTEL!

 

[dood]

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