Test for list item markers in vertical mode:
Mode vertical-lr, style lower-roman:

1. one
2. two
3. three
4. four
5. five
6. six
7. seven
8. eight
9. nine
10. ten
11. eleven
12. twelve

Mode vertical-rl, style hebrew:

1. one
2. two
3. three
4. four
5. five
6. six
7. seven
8. eight
9. nine
10. ten
11. eleven
12. twelve

Mode vertical-lr, style trad-chinese-formal:

1. one
2. two
3. three
4. four
5. five
6. six
7. seven
8. eight
9. nine
10. ten
11. eleven
12. twelve

Mode vertical-rl, style japanese-informal:

1. one
2. two
3. three
4. four
5. five
6. six
7. seven
8. eight
9. nine
10. ten
11. eleven
12. twelve