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 complications data. 

If the patient experienced cardiogenic shock at the time of admission to the intensive care unit (K_SH_POST = yes), it is possible that they may have chronic heart failure. However, it does not guarantee the presence of chronic heart failure as not all patients with cardiogenic shock develop chronic heart failure.

If the patient did not experience cardiogenic shock at the time of admission to the intensive care unit (K_SH_POST = no), it is less likely that they have chronic heart failure. 

Based on this analysis, we can create a dictionary with the possible values of the feature "K_SH_POST" for each target class:

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

Note that in this case, both the "no" and "yes" target classes only have one possible value for the feature "K_SH_POST".