_id	id	gridcode
1	""	1
2	""	1
3	""	1
4	""	1
5	""	1
6	""	1
7	""	2
8	""	2
9	""	2
10	""	2
11	""	2
12	""	2
13	""	2
14	""	2
15	""	2
16	""	2
17	""	3
18	""	3
19	""	3
20	""	3
21	""	3
22	""	3
23	""	3
24	""	3
25	""	3
26	""	3
27	""	4
28	""	4
29	""	4
30	""	4
31	""	4
32	""	4
33	""	4
34	""	4
35	""	4
36	""	5
37	""	5
38	""	5
39	""	5
40	""	5
41	""	5
42	""	5
43	""	5
44	""	5
45	""	5
46	""	5
47	""	6
48	""	6
49	""	6
50	""	6
51	""	6
52	""	3