Q: What Is Dozenal A: Dozenal is a Base 12 system with upside down 2 called "Dess" to represent 10 and flipped 7 called "Ell" to represent 11, do not skip these numbers. Q: What are the digits? A: The digits are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, Dess, and Ell. and do not skip Dess and Ell.