Concatenate formula

Concatenate formula

I'm trying to create a formula that concatenate the initials of the contacts name, as well as the date specified in the sales order, for example John Doe and 23/08/2022 becomes JD230822

Substring(${Sales Orders.Contacts Name}, 1,2)Dayofmonth(${Sales Orders.Date})Month(${Sales Orders.Date})Year(${Sales Orders.Date})​