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Find password (longest password)

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Time limit: 1s Space limit: 32MB Limited language: unlimited

Title description:

Xiao Wang is playing a big game, and there is a level that needs to enter a password to pass. The conditions for obtaining the password are as follows: In a password book, each page has a password composed of 26 lowercase letters, and the passwords of each page are different. It is necessary to find such a longest password from the code book. Starting from the end of it, the new password obtained by removing one bit in turn also exists in the codebook. Please output the passwords that meet the requirements, if there are multiple passwords that meet the requirements, return a dictionary