one(0): 

two(1): 3 

Min:3 Max:3

three(3): 3 5 8 

four(3): 3 5 8 

one(3): 3 6 8 

three is not equal to two.

three is equal to four.

three is not equal to one.

two(1): 3 

two(2): 3 8 

two(3): 3 5 8 

two(4): 3 5 6 8 

two(3): 3 5 8 

two(3): 3 5 8 

Min:3 Max:8

three(0): 

two is not empty.

two(0): 

two is empty.

5 is in four.

6 is not in four.

one(3): 3 6 8 

two(0): 

three(2): 3 8 

four(3): 3 5 8 

four-two=(3): 3 5 8 

one-four=(1): 6 

three-three=(0):