python easy solution
\tclass Solution:\n\t\tdef canFormArray(self, arr: List[int], pieces: List[List[int]]) -> bool:\n\t\t\tfor i in pieces:\n\t\t\t\tif i[0] not in arr:\n\t\t\t\t\t
\tclass Solution:\n\t\tdef canFormArray(self, arr: List[int], pieces: List[List[int]]) -> bool:\n\t\t\tfor i in pieces:\n\t\t\t\tif i[0] not in arr:\n\t\t\t\t\treturn False\n\t\t\t\tidx = arr.index(i[0])\n\t\t\t\tif arr[idx:idx + len(i)] != i:\n\t\t\t\t\treturn False\n\t\t\treturn True
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