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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-columns: repeat(10, 30px);
border: 1px solid;
padding: 0 2px;
}
.grid-lanes > div {
position: relative;
display: grid;
grid-column: 2 / span 2;
grid: auto / subgrid;
padding: 4px 0 1px 10px;
border: 1px solid black;
background: grey;
}
n {
height: 20px;
}
x {
position: absolute;
left: 0;
right: 0;
background: silver;
}
.hr { writing-mode: horizontal-tb; direction: rtl; }
</style>
</head>
<body>
<div class="grid-lanes">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div>
<x style="grid-column: -1">x</x>
</div>
</div>
<br>
<div class="grid-lanes">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div>
<x style="grid-column: 2">x</x>
</div>
</div>
<br>
<div class="grid-lanes" style="grid-template-columns: repeat(9, 30px) [a] 30px;">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div style="grid-column-end:span 5">
<x style="grid-column: 2">x</x>
</div>
</div>
<br>
<div class="grid-lanes" style="grid-template-columns: repeat(5, [a] 30px) repeat(5, 30px);">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div style="grid-column:2/span 5">
<x style="grid-column: 4">x</x>
</div>
</div>
<br>
<div class="grid-lanes" style="grid-template-columns: repeat(4, 30px) [a] 30px repeat(5, 30px);">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div style="grid-column-end:span 6">
<x style="grid-column: 2 / 4">x</x>
</div>
</div>
<br>
<div class="grid-lanes">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div style="grid-column-end:span 3">
<x style="grid-column: -1">x</x>
</div>
</div>
<br>
<div class="grid-lanes" style="grid-template-columns: repeat(3, 30px) [a] 30px repeat(7, 30px);">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div style="grid-column:2/span 6">
<x style="grid-column: 3 / 5">x</x>
</div>
</div>
<br>
<div class="grid-lanes" style="grid-template-columns: repeat(3, 30px) [a] 30px repeat(7, 30px);">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div style="grid-column:2/span 6">
<x style="grid-column: 3 / 5">x</x>
</div>
</div>
<br>
<div class="grid-lanes">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div class="hr">
<x style="grid-column: 3 / auto">x</x>
</div>
</div>
<br>
<div class="grid-lanes">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div class="hr">
<x style="grid-column: 2 / auto">x</x>
</div>
</div>
<br>
<div class="grid-lanes" style="grid-template-columns: repeat(9, 30px) [a] 30px;">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div class="hr" style="grid-column-end:span 5">
<x style="grid-column: 2 / auto">x</x>
</div>
</div>
<br>
<div class="grid-lanes" style="grid-template-columns: repeat(5, [a] 30px) repeat(5, 30px);">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div class="hr" style="grid-column:2/span 5">
<x style="grid-column: 6 / auto">x</x>
</div>
</div>
<br>
<div class="grid-lanes" style="grid-template-columns: repeat(4, 30px) [a] 30px repeat(5, 30px);">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div class="hr" style="grid-column-end:span 6">
<x style="grid-column: 2 / 4">x</x>
</div>
</div>
<br>
<div class="grid-lanes">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div class="hr" style="grid-column-end:span 3">
<x style="grid-column: 4 / auto">x</x>
</div>
</div>
<br>
<div class="grid-lanes" style="grid-template-columns: 30px [a] repeat(2, 30px) [a] 30px repeat(7, 30px);">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div class="hr" style="grid-column:2/span 6">
<x style="grid-column: 5 / 7">x</x>
</div>
</div>
<br>
<div class="grid-lanes" style="grid-template-columns: 30px [a] repeat(2, 30px) [a] 30px repeat(7, 30px);">
<n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n><n></n>
<div class="hr" style="grid-column:2/span 6">
<x style="grid-column: 5 / 7">x</x>
</div>
</div>
</body>
</html>