The Playfair cipher with $I = J, X$ added into two same letters and the key keep distance.
CORONAVIRUS SPREADS FAST
The whitespaces in plaintext and key are to be discarded.
not sure what they mean by I = J, X
I am not quite sure what they are asking for. I know that you usally remove letter J and replace it by I, But now it says * I = J,X" what does he mean by that?
This is what I've written as "coronavirus spreads fast"
CO RO NA VI RU SX SP RE AD SF AS TX