triplet

<mxfile host="app.diagrams.net" modified="2021-02-23T14:04:43.535Z" agent="5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36" etag="71mQ0DEo1MBF10epkp-Z" version="14.4.2" type="device"><diagram id="C5RBs43oDa-KdzZeNtuy" name="Page-1">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</diagram></mxfile>