Parameter

 

y

   One of the following one- or two-letter codes:

   Code     Form of Sequence and Case

   D        Decimal numbers
   O        Octal numbers
   H        Hexadecimal numbers
   RU       Roman uppercase numerals
   RL       Roman lowercase numerals
   RM       Roman mixed case numerals - only first numeral is
            uppercase
   LU       Letters, uppercase
   LL       Letters, lowercase
   LM       Letters, mixed case - only first letter is uppercase