Install the Code2000 font to view the results.
latin in mongolian
Test passes if the order and rotation of Latin characters is the same.
Assertion: Setting writing-mode to tb-lr will cause Latin text embedded in vertical Mongolian to flow down the page, with letters rotated 90 degrees clockwise, and wrap to the right.
= means you should check that the test and reference graphic look the same. If not, check the instruction text.