cluster_id	sec_channel
0	0
1	0
2	0
3	0
4	0
5	1
6	2
7	3
8	3
9	0
10	0
11	3
13	0
14	1
15	0
16	0
19	2
20	0
21	2
23	1
24	0
25	0
26	0
27	3
28	0
29	0
33	3
34	3
35	0
36	0
39	2