Tip 1: 2, 5, 8, 14, 15, 23  |  Extra: 2<br>Tip 2: 2, 3, 9, 11, 21, 22  |  Extra: 4<br>Tip 3: 3, 7, 9, 15, 19, 20  |  Extra: 5<br>Tip 4: 1, 3, 8, 10, 14, 20  |  Extra: 6<br>Tip 5: 6, 7, 19, 20, 25, 27  |  Extra: 6<br>