import numpy as np

exam_results = np.array(
    [['oppgnr', '1', '2', '3', '4', '5', '6', '7', '8', '9', '10'],
    ['fasit', 'c', 'a', 'b', 'a', 'b', 'd', 'a', 'c', 'b', 'd'],
    ['100', 'a', 'b', 'a', 'd', 'b', 'a', 'a', 'c', 'a', 'c'],
    ['101', 'c', 'a', 'b', 'a', 'b', 'd', 'a', 'c', 'b', 'd'],
    ['102', 'c', 'b', 'b', 'd', 'b', 'a', 'a', 'c', 'b', 'd'],
    ['103', 'c', 'b', 'b', 'd', 'b', 'd', 'a', 'c', 'b', 'd'],
    ['104', 'c', 'a', 'd', 'a', 'b', 'a', 'c', 'c', 'b', 'd']])