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<!DOCTYPE HTML>
<html><head>
<meta charset="utf-8">
<style>
html,body {
color:black; background-color:white; font:12px/1 monospace;
}
.grid-lanes {
display: inline-grid-lanes;
grid-template-rows: repeat(10,30px);
}
div > div {
position: relative;
display: grid;
grid-row: 2 / span 2;
grid: subgrid / auto;
border: 1px solid black;
background: grey;
}
x {
background: silver;
}
.rtl { writing-mode: vertical-rl; direction:rtl; }
.ltr { writing-mode: vertical-rl; direction:ltr; }
</style>
</head>
<body>
<div class="grid-lanes">
<div class="rtl" style="grid-template-rows: subgrid [a][][];">
<div class="ltr" style="grid-template-rows: subgrid [a][][];">
<x style="grid-row: 1;">x</x>
</div>
</div>
</div>
<div class="grid-lanes">
<div class="rtl" style="grid-template-rows: subgrid [][][a];">
<div class="ltr" style="grid-template-rows: subgrid [a][][];">
<x style="grid-row: 1;">x</x>
</div>
</div>
</div>
<div class="grid-lanes">
<div class="rtl" style="grid-template-rows: subgrid [][][a]; grid-row-end:span 5;">
<div class="ltr" style="grid-template-rows: subgrid [a][][];">
<x style="grid-row: 2;">x</x>
</div>
</div>
</div>
<div class="grid-lanes">
<div class="rtl" style="grid-template-rows: subgrid [a][a] 30px;">
<div class="ltr" style="grid-template-rows: subgrid [][][a];">
<x style="grid-row: 3;">x</x>
</div>
</div>
</div>
<div class="grid-lanes">
<div class="rtl" style="grid-template-rows: subgrid [a][a] 30px;">
<div class="ltr" style="grid-template-rows: subgrid [a][][];">
<x style="grid-row: 1;">x</x>
</div>
</div>
</div>
<div class="grid-lanes">
<div class="rtl" style="grid-template-rows: subgrid [][][a]; grid-row-end:span 5;">
<div class="ltr" style="grid-template-rows: subgrid [a][][];">
<x style="grid-row: 1;">x</x>
</div>
</div>
</div>
<div class="grid-lanes">
<div class="rtl" style="grid-template-rows: subgrid [][][a]; grid-row-end:span 5;">
<div class="ltr" style="grid-template-rows: subgrid [a][][];">
<x style="grid-row: 2;">x</x>
</div>
</div>
</div>
<div class="grid-lanes" style="grid-template-rows: repeat(9,30px) [a] 30px;">
<div class="rtl" style="grid-template-rows: subgrid [][][a]; grid-row-end:span 5;">
<div class="ltr" style="grid-template-rows: subgrid [a][][];">
<x style="grid-row: 1;">x</x>
</div>
</div>
</div>
<div class="grid-lanes" style="grid-template-rows: repeat(9,30px) [a] 30px;">
<div class="rtl" style="grid-template-rows: subgrid [][][a]; grid-row-end:span 5;">
<div class="ltr" style="grid-template-rows: subgrid [a][][];">
<x style="grid-row: 2;">x</x>
</div>
</div>
</div>
<div class="grid-lanes" style="grid-template-rows: repeat(9,30px) [a] 30px;">
<div class="rtl" style="grid-template-rows: subgrid [][][a]; grid-row:2/span 5;">
<div class="ltr" style="grid-template-rows: subgrid [a][][];">
<x style="grid-row: 1;">x</x>
</div>
</div>
</div>
<div class="grid-lanes" style="grid-template-rows: repeat(9,30px) [a] 30px">
<div class="rtl" style="grid-template-rows: subgrid [][][a]; grid-row:2/span 5;">
<div class="ltr" style="grid-template-rows: subgrid [a][][];">
<x style="grid-row: 2;">x</x>
</div>
</div>
</div>
<div class="grid-lanes" style="grid-template-rows: repeat(4,30px) [a] 30px repeat(5,30px);">
<div class="rtl" style="grid-template-rows: subgrid [a][a]; grid-row:2/span 5;">
<div class="ltr" style="grid-template-rows: subgrid [a][a];">
<x style="grid-row: 1;">x</x>
</div>
</div>
</div>
<div class="grid-lanes" style="grid-template-rows: repeat(4,30px) [a] 30px repeat(5,30px);">
<div class="rtl" style="grid-template-rows: subgrid [a][a]; grid-row:2/span 5;">
<div class="ltr" style="grid-template-rows: subgrid [a][a];">
<x style="grid-row: 2;">x</x>
</div>
</div>
</div>
<div class="grid-lanes">
<div class="rtl" style="grid-template-rows: subgrid [a] [a] [] [a]; grid-row-end:span 3;">
<div class="ltr" style="grid-template-rows: subgrid [a] [a] [] [a]; grid-row-end:span 3;">
<x style="grid-row: 1;">x</x>
</div>
</div>
</div>
<div class="grid-lanes">
<div class="rtl" style="grid-template-rows: subgrid [a] [a] [] [a]; grid-row-end:span 3;">
<div class="ltr" style="grid-template-rows: subgrid [a] [a] [] [a]; grid-row-end:span 3;">
<x style="grid-row: 2;">x</x>
</div>
</div>
</div>
</body>
</html>