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https://github.com/justinbois/bootcamp/blob/gh-pages/2023/lessons/l01_welcome 
Could not find l01_welcome in https://api.github.com/repos/justinbois/bootcamp/contents/2023/lessons?per_page=100&ref=gh-pages
CustomError: Could not find l01_welcome in https://api.github.com/repos/justinbois/bootcamp/contents/2023/lessons?per_page=100&ref=gh-pages
    at new nM (https://ssl.gstatic.com/colaboratory-static/common/8f8a028fad0fa8abbc0689c7520a5a43/external_binary.js:2449:68)
    at ua.program_ (https://ssl.gstatic.com/colaboratory-static/common/8f8a028fad0fa8abbc0689c7520a5a43/external_binary.js:2436:442)
    at ya (https://ssl.gstatic.com/colaboratory-static/common/8f8a028fad0fa8abbc0689c7520a5a43/external_binary.js:16:57)
    at ua.next_ (https://ssl.gstatic.com/colaboratory-static/common/8f8a028fad0fa8abbc0689c7520a5a43/external_binary.js:14:195)
    at kaa.next (https://ssl.gstatic.com/colaboratory-static/common/8f8a028fad0fa8abbc0689c7520a5a43/external_binary.js:17:48)
    at b (https://ssl.gstatic.com/colaboratory-static/common/8f8a028fad0fa8abbc0689c7520a5a43/external_binary.js:17:309)
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