code: func pluralRule3A(n NumberValue) PluralRule {
  	isInt := isInt(n)
  	i := int64(math.Abs(toFloat64(n)))
  
  	switch {
  	case isInt && i == 0:
  		return PluralRuleZero
  	case isInt && i%10 == 1 && i%100 != 11:
  		return PluralRuleOne
  	}
  	return PluralRuleOther
  }
docs: // pluralRule3A:
  // Logic for calculating the nth plural for Latvian or languages who share the same rules as Latvian
  //
  // Plural Forms Rules Documented here:
  // https://developer.mozilla.org/en/docs/Localization_and_Plurals
  //
  // This Plural Rule contains 3 forms:
  //     - zero:
  //         - rule:     n is 0
  //         - examples: 0
  //     - one:
  //         - rule:     n mod 10 is 1 and n mod 100 is not 11
  //         - examples: 1, 21, 31, 41, 51, 61, 71, 81, 91, 101, 121, 131, 141, 151, 161, 171, 181, …
  //     - other:
  //         - rule:     everythng else
  //         - examples: 2, 2.5, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, …
  //
  // Languages:
  //     - lv: Latvian