class Planet
    attr_reader :list_marker

    @@list_marker = []

    def initialize(name_planet)
        @name_planet = name_planet
        @list_marker = []
    end

    def list_marker
        @@list_marker
    end

    def find_sys(place)

        if place.location == @name_planet
            @@list_marker << place

            puts "our system"
        else
            puts "not our system"
        end
    end

end


class Map
    attr_accessor :location

    def initialize

        @long = 66
        @width = 33
        @location = 'moon'
    end

end

planet = Planet.new('moon')

global_map = Map.new
big_map = Map.new
little_map = Map.new

planet.find_sys(global_map)
planet.find_sys(big_map)
planet.find_sys(little_map)

p planet.list_marker.map(&:location)