Mma

A grade

{ 5, 9, 11, 16 }

B grade

{ 2, 3, 4, 6, 7, 8, 10, 12, 13 }

C grade

{ 1, 17 }

F normal fail

{ 14, 15, 18, 19 }

F(-1) timedout fail

{ }

F(-2) exception fail

{ }