deletions | additions       diff --git a/At_the_start_we_created__.tex b/At_the_start_we_created__.tex  index d953dea..9c323d0 100644  --- a/At_the_start_we_created__.tex  +++ b/At_the_start_we_created__.tex 
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At the start, we created the empty lists for biases and flats.   Now, we must  populate them. We implement if loops in order to grab only the flats and biases and nothing else.