cluster_id	sec_channel
0	1
1	2
2	1
3	3
4	0
5	1
7	3
8	3
9	0
10	0
11	2
13	0
16	2
17	2
19	0
20	0
21	1
22	0
23	0
24	0
25	0
26	0
27	0
28	0
30	0
31	0
32	0
33	0
34	0