Add introduction

Author: BNAndras

exercises/ocr-numbers/introduction.md

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+# Introduction
+
+Your best friend Marta recently landed their dream job working with a local history museum’s collections.
+Knowing of your interests in programming, they confide in you about an issue at work for an upcoming exhibit on computing history.
+A local university’s math department had donated several boxes of historical printouts, but given the poor condition of the documents, the decision has been made to digitize the text.
+However, the university’s old printer had some quirks in how text was represented, and your friend could use your help to extract the data successfully.