cluster_id	sec_channel
0	0
1	2
2	2
3	1
4	2
5	0
6	0
7	2
8	2
9	0
10	0
11	0
12	0
13	0
14	0
15	1
16	2
17	2
18	0
19	2
20	0
21	2
22	0
23	0
24	2
25	0
26	0
27	2
28	1
29	1
30	0
31	0
32	2
33	2