Assume that a website only allows a string of length 6 as a password for a user account. Valid characters fo a password consist of lowercase letters, uppercase letters, digits, or underscores, and the passwords must meet the following requirements: ● The password cannot begin or end with an underscore. If the password begins with a consonant, then the remaining 5 characters must include an odd digit. If the password begins with a vowel, then it must contain exactly 3 digits, and those digits must be distinct. Y" is not considered a vowel. ► If the password begins with a number, the product of all numerical digits in the password must be odd.

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
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Assume that a website only allows a string of length 6 as a password for a user account. Valid characters for
a password consist of lowercase letters, uppercase letters, digits, or underscores, and the passwords must
meet the following requirements:
The password cannot begin or end with an underscore.
If the password begins with a consonant, then the remaining 5 characters must include an odd digit.
If the password begins with a vowel, then it must contain exactly 3 digits, and those digits must be
distinct. Y" is not considered a vowel.
If the password begins with a number, the product of all numerical digits in the password must be odd.
How many unique passwords exist under the given constraints?
●
Transcribed Image Text:Assume that a website only allows a string of length 6 as a password for a user account. Valid characters for a password consist of lowercase letters, uppercase letters, digits, or underscores, and the passwords must meet the following requirements: The password cannot begin or end with an underscore. If the password begins with a consonant, then the remaining 5 characters must include an odd digit. If the password begins with a vowel, then it must contain exactly 3 digits, and those digits must be distinct. Y" is not considered a vowel. If the password begins with a number, the product of all numerical digits in the password must be odd. How many unique passwords exist under the given constraints? ●
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