deletions | additions       diff --git a/layout.md b/layout.md  index 645e1bd..e3f0316 100644  --- a/layout.md  +++ b/layout.md 
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figures/stirling number of 1st/stirling number of 1st.png  The_notation_of_each_Stirling__.html  Differences_between_Stirling_numbers_of__.html  div_b_Suggested_Exam_Problem__.html