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<!DOCTYPE html>
<html>
<style>
.grid {
    display: grid;
    grid-template-rows: repeat(4, 50px);
    grid-template-columns: repeat(4, 40px);
    grid-auto-flow: column;
}
.upwards {
    transform: translateX(-20px);
}
</style>
<body>
  <p>Ensure that dense-packing in masonry only places items with a specified track into track openings in that same specified track.</p>
  <div class="grid">
    <div style="background: brown; width: 20px;"></div>
    <div style="background: brown; width: 40px;"></div>
    <div style="background: pink; width: 20px;"></div>
    <div style="background: brown; width: 60px;"></div>
    <div style="background: brown; width: 20px; grid-row: span 2;"></div>
    <div style="background: brown; width: 20px; grid-row: span 4; transform: translateX(-20px);"></div>
    <div style="background: brown; width: 20px; grid-row: span 3; transform: translateX(-40px);"></div>
    <div style="background: yellow; width: 20px; grid-row-start: 4; transform: translateX(-40px);"></div>
    <div style="background: brown; width: 20px; grid-row: span 4; transform: translateX(-60px);"></div>
  </div>
</body>
</html>