How do you use numbers in wizard101

They don't allow numbers (1, 2, 3) to be used in open chat because they are afraid that little kids can give stalkers and random people they don't even know about their address, telephone number, age, etc., but you can use some coding to sneak some numbers over the filter (for example, say "tin" as in "tin can" to imply the number 10), but you might be caught and banned and/or muted for jumping around the filter though.