It’s not exactly earth based. It’s binary with ones and zeros being having a values equal to vibrational frequency of something to do with hydrogen I think. Plus math is universal, it is the first language we would use to communicate with an alien species.

Sds&ff Sdfrd&erf Aq&s

Not knowing what any of those symbols mean you could figure out that “&” means greater than as there are always more symbols to the left than on the right.