In the next step, words that are Cognate with Modern English are replaced. Note I am only replacing the cognates that are very obvious.
const len1 = nums1.length;
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"It's for everybody."
The grid lines on the visualization represent a tree structure underneath. Every region is a node. When a node splits, it creates four children. The root node covers the entire space. Leaf nodes (nodes with no children) hold the actual points.