Hashtag Validator

You are given a list of strings representing hashtags. A valid hashtag must satisfy the following conditions:

• It starts with the symbol \(\#\).
• It has at least one alphanumeric character following the \(\#\).
• All characters after the \(\#\) are alphanumeric (i.e. letters or digits).
• No hashtag appears more than once.

Your task is to determine if the list of hashtags is valid. If the list is valid, output True; otherwise, output False.

inputFormat

The input is provided via standard input (stdin) and consists of:

1. An integer \(n\) (\(n \ge 0\)) — the number of hashtags.
2. \(n\) lines, each containing a hashtag (a non-empty string).

outputFormat

Output a single line: True if the list of hashtags is valid under the rules, otherwise False.

## sample

3
#love
#sunshine
#123

True

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