Nominative Case

• Base form of a noun
• Change the ending only when forming the plural

Plural

Masculine	Feminine	Neuter
(ends in consonant) -> -ы
-й -> -и	-я -> -и	-о -> -а
-ь -> -и	-ь -> -и	-е -> -я
	(Г, К, Х, Ж, Ч, Ш, Щ) + -а -> -и (otherwise) -а -> -ы