class Somehow
    attr_reader :a, :b

    def initialize(a: 0, b: 0)
        @a, @b = a, b
        @array = []
    end

    def datainput
        begin
            @a, @b = gets.chomp.split.map { |v| Integer(v) }
        rescue
            
        end
    end

    def multiples3(a, b)
        (a..b).each do |i|
            @array << i if i % 3 == 0 or i.to_s.include?("3")
        end
        @array.sort
    end

    def dataoutput
        puts multiples3(@a, @b)
    end

    def run
        datainput
        dataoutput
    end
end

if $0 == __FILE__
    Somehow.new.run
end