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