some nouns totally change for their genitive plural forms: , but (years); , but (people; optional). count forms for adjectives and nouns with adjectival declension after numerals require genitive plural and nominative plural: (g. pl.) (g. sg.) "2 best players"; (n. pl.) (n. pl.) lit. "3 green strait_lines", but (g. pl.) (g. pl.) (g. sg.) lit. "3 green strait strokes".