Minimum Time to Type Word Using Special Typewriter LeetCode solution in Python

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class Solution:
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    def minTimeToType(self, word: str) -> int:
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        prev = "a"
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        res = 0
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        for c in word:
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            gap = abs(ord(c) - ord(prev))
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            res += min(gap, 26 - gap)
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            prev = c
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        return res + len(word)