testing the "split" class
make set - max=5
size =0   0 1 2 3 4  | 
toggle(4)
size =1   0 1 2 3  | 4 
toggle(4)
size =0   0 1 2 3 4  | 
toggle(4)
size =1   0 1 2 3  | 4 
toggle(3)
size =2   0 1 2  | 3 4 
toggle(3)
size =1   0 1 2 3  | 4 
toggle(0)
size =2   0 4  | 1 2 3 
toggle(1);
size =2   0 1 4  | 2 3 
toggle(1);
size =2   0 4  | 1 2 3 
toggle(1);
size =2   0 1 4  | 2 3 
toggle(0)
size =2   0 2 3  | 1 4 
toggle(0)
size =2   0 1 4  | 2 3 

test split constractor from iterator
size =2   0 2 4  | 1 3 
size =2   0 1  | 2 3 4 


Testing competability
size =2   0 1 4  | 2 3 
 and size =2   0 2 4  | 1 3 
	:0
size =2   0 1 4  | 2 3 
 and size =2   0 1  | 2 3 4 
	:1