| Nominative | prastrýko |
| Genitive | prastrýka |
| Dative | prastrýkovi |
| Accusative | prastrýka |
| Locative | prastrýkovi |
| Instrumental | prastrýkom |
| Nominative | prastrýkovia |
| Genitive | prastrýkov |
| Dative | prastrýkom |
| Accusative | prastrýkov |
| Locative | prastrýkoch |
| Instrumental | prastrýkmi |