Sympy

A grade

{ 1, 2, 3, 4, 5, 6 }

B grade

{ }

C grade

{ }

F normal fail

{ 7, 8, 9, 10, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23 }

F(-1) timedout fail

{ 11, 12, 17 }

F(-2) exception fail

{ }