0	1	1	0
0	2	2	0
0	2	3	0
0	3	4	0
1	2	1	0
1	4	2	0
1	2	3	0
1	3	4	0
2	2	1	0
2	2	2	0
2	2	3	0
2	3	4	0
3	0
4	2	1	0
4	2	2	0
4	5	3	0
4	3	4	0
5	2	1	0
5	2	2	0
5	2	3	0
5	6	4	0