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