cluster_id	sec_channel
0	1
1	3
2	1
3	3
4	0
5	3
6	2
7	3
8	0
9	3
10	1
11	2
12	1
13	1
14	1
15	1
16	1
17	1
18	1
19	3
20	3
21	3
22	2
23	1
24	0
25	0
26	1
27	1
28	0
29	0
30	0
31	3
32	0
33	0
34	0
35	0
36	0
37	0
38	1
39	0
40	1
41	3
42	1
43	3
44	0
45	1
46	0
47	0
48	2
49	3
50	2
51	2
52	1
53	1
54	1
55	0
56	3
57	3
58	0
59	0
60	1
61	0
62	1
63	0
64	1
65	2
66	3
67	2
68	0
69	2
70	0
71	0
72	0