exam grades

4158 A
3996 A
7328 B
9895 B
2115 B
2142 B
4837 B+
7903 B+
1478 C
4190 C
4779 C+
6798 D+
9430 D+
1133 did not write
9155 did not write
2425 did not write
8854 did not write
2316 F
3227 F