h.tickle();
assertEquals( 4, h.suggested() ); // avg(10, 10, 0, 0, 0) == 4
h.tickle();
assertEquals( 6, h.suggested() ); // avg(10, 10, 10, 0, 0) == 6
h.tickle();
assertEquals( 8, h.suggested() ); // avg(10, 10, 10, 10, 0) == 8
h.tickle();
assertEquals( 10, h.suggested() ); // avg(10, 10, 10, 10, 10) == 10
h.tickle();
assertEquals( 10, h.suggested() ); // avg(10, 10, 10, 10, 10) == 10