Grokking Graph Algorithms for Coding Interviews
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Solution: Similar String Groups
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Problem Statement

Two strings, X and Y, are considered similar if they are identical or can be made identical by swapping at most two distinct positions.

For example, "abcd" and "bacd" are similar (swapping at positions 0 and 1), "abcd" and "acbd" are also similar, but "dabc" is not similar to "abcd", "bacd", and "acbd".

Together, these form two connected groups by similarity: {"abcd", "bacd", "acbd"} and {"dabc"}. Notice that "bacd" and "acbd" are in the same group even though they are not similar

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