Move Pieces to Obtain a String LeetCode solution in Python

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class Solution:
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    def canChange(self, A: str, B: str) -> bool:
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        P = lambda c: c != "_"
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        I = lambda s, x: [i for i, c in enumerate(s) if c == x]
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        G = lambda d, p: all(p(x, y) for x, y in zip(I(A, d), I(B, d)))
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        S = lambda: [*filter(P, A)] == [*filter(P, B)]
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        return S() and G("L", ge) and G("R", le)
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