Simple & Easy Solution by Python 3
\nclass Solution:\n    def canFormArray(self, arr: List[int], pieces: List[List[int]]) -> bool:\n        for piece in pieces:\n            if piece[0] not in ar
```\nclass Solution:\n    def canFormArray(self, arr: List[int], pieces: List[List[int]]) -> bool:\n        for piece in pieces:\n            if piece[0] not in arr:\n                return False\n            index = arr.index(piece[0])\n            if arr[index:index + len(piece)] != piece:\n                return False\n        return True\n```
['Python3']