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