This one of big telco's policy was taken as an another example of pure analytical rules about what good passwords should be look like.

See "Password rules" section on this page for complete description of policy.

Passwords from tops of Rockyou leak allowed by policy:

  11112 password1
   5187 princess1
   4497 blink182
   3998 iloveyou2
   3823 babygirl1
   3700 iloveyou1
   2808 jordan23
   2664 myspace1
   2654 michael1
   2398 anthony1

Visit link to see policy implementation used.