states 20 and 21 are missing from trial.state

Y:\MRI\Human\fMRI-reach-decision\Pilot\behavioral data\LEHU\20190723\LEHU_2019-07-23_05.mat

``` Matlab
>> find(trial(3).state==20)
ans =  Empty matrix: 0-by-1

>> trial(3)
ans =  states: [1 2 3 6 7 9 10 4 5 20 21]
```