This shows what characters can separate classes in HTML.
<div class="$[chr]x$[chr]"></div>if(document.querySelector('.x'))log($[i]);<div class="0x09x0x09"></div><div class="
x
"></div><div class="0x0Cx0x0C"></div><div class="0x0Dx0x0D"></div><div class=" x "></div>