What’s the cue for survival?

1-9-2-6 1-11-1-6 1-15-2-8
2-4-2-8
2-7-5-9

4-5-6-7 4-6-9-6 4-11-6-7 4-20-6-2
7-1-2-2 7-18-2-2 7-28-2-2
8-1-10-6 8-3-1-9 8-5-8-4

11-1-10-8 11-10-2-2
11-19-2-2

12-6-2-3
14-1-1-13 14-4-3-8 14-6-11-5 14-8-5-8
15-6-1-7

16-1-13-5 16-2-1-6 16-4-10-5
18-2-6-10
18-6-5-8 18-7-2-13 18-9-7-8
24-2-7-7
24-9-7-5 26-1-2-6 26-5-1-11
28-12-6-3

31-9-5-5 31-12-3-7
33-4-3-5 33-5-3-6
35-1-2-2 35-6-2-7

5