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#!/usr/bin/env python3
def string_score(string):
''' Given a, string, return the score of the given string.
The score of a string is defined as the sum of the absolute difference
between the ASCII values of adjacent characters.
>>> string_score('hello')
13
>>> string_score('perl')
30
>>> string_score('raku')
37
'''
return sum(abs(ord(a) - ord(b)) for a, b in zip(string, string[1:]))
if __name__ == "__main__":
import doctest
doctest.testmod(verbose=True)
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