In one or two sentences, explain how to use that atmosphere to show position for singular and PLURAL, nouns and two form CONTRACTRON.

To show positions for singular nouns in atmosphere, use the preposition "at" followed by the specific location, while for plural nouns, use the preposition "in" or "inside" followed by the location. For the two form CONTRACTRON, add the preposition "on" or "on top of" followed by the location.