cluster_id	sec_channel
0	0
1	0
2	3
3	0
4	0
5	0
6	0
7	1
8	0
9	1
10	2
11	2
12	3
13	1
14	2
15	1
16	1
17	2
18	0
19	0
20	2
21	1
22	1
23	1
24	2
25	2
26	3
27	2
28	0
29	1
30	0
31	0
32	0
33	2
34	2
35	0
36	0
37	0
38	0
39	1
40	0
41	3
42	1
43	2
44	1
45	0
46	2
47	2
48	2
49	1
50	0
51	1
52	3
53	1
54	2
55	1
56	1
57	2
58	3
59	0
60	2
61	0
62	2
63	3