The Middle Judge

Three judges each give a score. To stop one harsh or generous judge from swinging things, the contest uses the middle score — the one that's neither the lowest nor the highest.

Task: write middle_score(a, b, c) that returns the middle of the three numbers.

• If some scores are equal, the middle is still the one in the centre once they're in order. For example, the middle of 7, 9, 7 is 7.