Lead with blanks first, if applicable. These can be typed with simple spaces.
Type special characters second. These can include the following: <>?!@#$%^&*(){}[]\|-_=+". The order of these characters can be derived from the American Standard Code for Information Exchange.
Type numerals third. Use numerical order, 0-9.
Insert double-digit numbers. Order them by the first digit. For example, 11 would come before 2. The number 22 would come before 3. The number 33 would come before 4. Order the second digit of the second digit number numerically.
Type letters in alphabetical order last.