Easy To understand Python Solution
\nclass Solution:\n    def destCity(self, paths: List[List[str]]) -> str: \n        A = set()\n        B = set()\n        \n        for j in paths:\n           
```\nclass Solution:\n    def destCity(self, paths: List[List[str]]) -> str: \n        A = set()\n        B = set()\n        \n        for j in paths:\n            A.add(j[0])\n            B.add(j[1])\n        return (B - A).pop()\n```
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