deletions | additions       diff --git a/Let_us_group_the.tex b/Let_us_group_the.tex  deleted file mode 100644  index 42f5fa5..0000000  --- a/Let_us_group_the.tex  +++ /dev/null 
...
Let us group the questions into several classes in terms of how easy to automatically judge they are:  diff --git a/layout.md b/layout.md  index a12216a..7751c1f 100644  --- a/layout.md  +++ b/layout.md 
...
beginitemize__item_t.tex  To_conclude_the_yesn.tex  sectionStructure_of_.tex  Let_us_group_the.tex  beginitemize__item_C.tex  sectionHow_Can_We_Kn.tex  The_initial_phase_of.tex