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<!doctype html>
<title>CSS writing mode test reference</title>
<meta charset=utf-8>
<style>
div {
line-height: 1em;
height: 1em;
writing-mode: vertical-rl;
}
</style>
<p>This test passes if the word “PASS” (without the quotation marks) appears below, written horizontally from left to right.
<div>S S A P</div>