cluster_id	sec_channel
0	3
1	0
2	1
3	1
4	1
5	1
6	2
7	3
8	3
9	0
10	2
11	3
12	3
13	1
14	2
15	2
16	3
17	1
18	3
19	2
20	2
21	2
22	3
23	3
24	2
25	3
26	3
27	1
28	2
29	3
30	3
31	3