class scores
a 74
a 97
a 79
a 88
a 78
a 93
a 76
a 75
a 82
a 86
a 100
a 94
b 78
b 92
b 94
b 78
b 71
b 85
b 70
b 79
b 76
b 93
b 82
b 69
b 84