Our URL is 16 characters long, including
the "http://". It includes all 26 alphabet
letters, lower and uppercase (case-sensitive),
and numbers. The math behind the maximum
number of combinations is something like this:
62/3*61/2*60 = 37820. After we reach the
37820 limit we will introduce another
character to the URL, increasing the possible
combinations to more than half a million.
