Bulgarian Solitaire $($Part $2)$ in Java

Write the code to implement the game.

For extra credit add an assertion.

here is a sample output, starting from $4$ piles:

$711234$

$-------------$

$3461022$

$2355921$

$12446820$

$13357719$

$22466718$

$113556717$

$24456816$

$133457715$

$223466814$

$1123557813$

$124467912$

$133568811$

$224577810$

$113466789$

$23556789$

$124456788$

$133456779$

$223456689$

$1123455789$

$1234467810$

$123356799$

$122456889$

$113457789$

$23466789$

$123556788$

$124456779$

$133456689$

$223455789$

$1123446789$

$1233567810$

$122456799$

$113456889$

$23457789$

$123466788$

$123556779$

$124456689$

$133455789$

$223446789$

$1123356789$

$1224567810$

$113456799$

$23456889$

$123457788$

$123466779$

$123556689$

$124455789$

$133446789$

$223356789$

$1122456789$

$1134567810$

$23456799$

$123456888$

$123457779$

$123466689$

$123555789$

$124446789$

$133356789$

$222456789$

$1113456789$

$234567810$

$123456789$