τετρα	singular, nominative	singular, nominative
	τετρας	singular, genitive	singular, genitive
	τετρα	singular, accusative	singular, accusative
	-	singular, vocative	singular, vocative
	τετρες	plural, nominative	plural, nominative
	τετρων	plural, genitive	plural, genitive
	τετρες	plural, accusative	plural, accusative
	-	plural, vocative	plural, vocative