Consider a system with no salts where users have a 4-digit number as a password (e. g. 6813). Eve wants to crack the accounts of two users, Alice and Bob. Eve gets the password file and performs an offline brute force attack, where she can hash 1000 passwords every second. Assume that the time to compare the hashes is negligible. In the worst case, in seconds, how long will it take Eve to crack both Alice's and Bob's accounts?