Count as high as you can before a student comes on

[Bat]

22

 

[Aurora]

23

 

[Aria]

23

 

[Bat]

25

 

[Evux]

Nope

 

[Aria]

1

 

[Bat]

2

 

[Aurora]

3

 

[Evux]

Oooops

 

[Bat]

1

 

[Aurora]

2

 

[Bat]

3

 

[Aurora]

4

 

[Bat]

5

 

[Aurora]

6

 

[Bat]

7

 

[Aurora]

8

 

[Bat]

9

 

[Tina]

10

 

[EnchantedValor]

Hate to ruin the fun and lengthy number train here.
0.