Activating encoder mode 5 2 00011 10001 11000 01100 00110 ? 1 2 < ? 3 4 < ? 5 2 < ? 1 5 > ? 3 2 > ! 4 3 2 1 5 ? 1 2 > ? 3 4 < ? 5 1 > ? 3 5 > ! 4 3 5 1 2 Grader gave feedback: Case #2: Wrong edge in answer, 2 to 4 Grader killed graded software