Username Validator

You are given a username as a string. Your task is to determine whether it is valid based on the following rules:

• The username must have a length between 5 and 20 characters, inclusive.
• The username can only consist of lowercase letters (a–z), digits (0–9), and underscores (_).
• The username must start with a lowercase letter.

For each username provided, print True if it is valid, or False otherwise.

inputFormat

The first line contains an integer T, the number of test cases.

Each of the following T lines contains a single string denoting a username.

outputFormat

For each test case, output a single line containing either True if the username is valid or False if it is not.

## sample

3
cool_user_123
UserCool_123
short

True
False
True

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