Sympy

A grade

{ 19, 21, 23, 24 }

B grade

{ 26 }

C grade

{ 1, 2, 3, 4 }

F normal fail

{ 5, 6, 8, 9, 10, 11, 12, 15, 16, 17, 18, 20, 22, 25, 27 }

F(-1) timedout fail

{ 7 }

F(-2) exception fail

{ }