... , chaining together the order of 3-7-5 is crucial. Next, remembering ... 4 is on F, then 5 has to be somewhere else ... know we have 3-7 before 5, so that means 5 has to ... that you don't pair 2 with 3, or 7 with 8. Ugh ... I realized that 3>7>5 could only move in ...