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<!--info-header-start--><h1>Concat </h1><blockquote><p>by Andrey Krasovsky <a href="https://github.com/bre30kra69cs" target="_blank">@bre30kra69cs</a></p></blockquote><p><a href="https://tsch.js.org/533/play" target="_blank"></a> &nbsp;&nbsp;&nbsp;<a href="./README.zh-CN.md" target="_blank"></a> <a href="./README.ja.md" target="_blank"></a> <a href="./README.ko.md" target="_blank"></a> </p><!--info-header-end-->

Implement the JavaScript Array.concat function in the type system. A type takes the two arguments. The output should be a new array that includes inputs in ltr order

For example:

ts
type Result = Concat<[1], [2]> // expected to be [1, 2]
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