To slow down any kind of brute-force attack on passwords, a password policy has been given by the University to be :- 'All passwords must be exactly 8 characters long and be composed of: first 3 characters any of upper case or lower case characters of English alphabet, next 2 characters any of the numeric digits but excluding any two digits all the same digits, next three characters being any of the characters $%^&* but excluding any three characters all the same character'. How many possible passwords could be produced from this policy?