2690 3
2690 2
2688 1
2688 2
2688 3
2687 0
2686 2
2685 1
2684 3
2684 1
2682 1
2682 2
2682 0
2680 2
2680 0
2680 3
2679 1
2679 3
2678 1
2678 4