The System Administrator has set the following rules for the password:

The password is a string made of $10$ characters.

The available characters are Hexadecimal digits $0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,$ and F$.$

Repetition is allowed unless otherwise stated.

passwords have exactly three distinct digits? AABBC ABAAA is an example of such

a password.