Based on prior knowledge, we can analyze the relationship between the feature "K_SH_POST" and the presence of chronic heart failure in myocardial infarction patients.

It's possible that patients with cardiogenic shock at the time of admission to the intensive care unit (K_SH_POST = "yes") are more likely to develop chronic heart failure. On the other hand, patients without cardiogenic shock (K_SH_POST = "no") may have a lower likelihood of chronic heart failure.

To create the dictionary, we can list the possible values of the feature "K_SH_POST" for each target class.

```json
{
	"no": ["no"],
	"yes": ["yes"]
}
```

In this case, the possible values for the target class "no" are only "no", and for the target class "yes", the possible value is "yes".