> 22 is self-inventorying
> 31123314 is self-inventorying
> 314213241519 enters an inventory loop of length 2
> 21221314 is self-inventorying after 2 steps
> 111222234459 enters an inventory loop of length 2
> 123456789 is self-inventorying after 5 steps
> 654641656 enters an inventory loop of length 2
> 2101400052100005496 enters an inventory loop of length 2
> 10000000002000000000 enters an inventory loop of length 3
> 333 is self-inventorying after 11 steps
> 1 is self-inventorying after 12 steps
> 99999999999999999999999999999999999999999999999999999999999999999999999999999999 can not be classified after 15 iterations
> 0000 enters an inventory loop of length 2
> 0001 is self-inventorying after 8 steps
> 0111 is self-inventorying after 8 steps
> 1111 is self-inventorying after 8 steps
> 123456789 is self-inventorying after 5 steps
> 456137892 is self-inventorying after 5 steps
> 123213241561 enters an inventory loop of length 2
> 543265544536464364 enters an inventory loop of length 2
> 5412314454766464364 is self-inventorying after 3 steps
> 543267685643564364 enters an inventory loop of length 2
> 5423434560121016464364 is self-inventorying after 3 steps