Easy python solution
class Solution:\n    def destCity(self, paths: List[List[str]]) -> str:\n        \n        source=[]\n        destination=[]\n        for i in paths:\n         
class Solution:\n    def destCity(self, paths: List[List[str]]) -> str:\n        \n        source=[]\n        destination=[]\n        for i in paths:\n            \n            source.append(i[0])\n            \n            destination.append(i[1])\n            \n        \n        for i in destination:\n            if i not in source:\n                return i
['String', 'Python']