deletions | additions       diff --git a/layout.md b/layout.md  index 6204d88..8b528dd 100644  --- a/layout.md  +++ b/layout.md 
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figures/Mass4/Mass4.png  12 vs 13 [4].tex  figures/Optically thick, thin, 13/Optically thick, thin, 13.png  Conclusion 12 vs 13.tex 13 [5].tex