سَلَّمْتُ عَلَى مُعَلِّمِينَ وَمُعَلِّمَاتٍ وَرِجَالٍ.
All three are genitive after ʿalā (directly or by coordination). The masculine sound plural has yāʾ, while the feminine sound and triptote broken plural have kasrah.
Opening interactive controls...
Genitive Across Plural Types
Plural Nouns: Sound, Broken, Paucity and Abundance
سَلَّمْتُ عَلَى مُعَلِّمِينَ وَمُعَلِّمَاتٍ وَرِجَالٍ.
All three are genitive after ʿalā (directly or by coordination). The masculine sound plural has yāʾ, while the feminine sound and triptote broken plural have kasrah.