Read the passage below, and list all the compound nouns, identifying them as open, closed, or hyphenated.

The sudden rain soaked unprepared pedestrians as raindrops quickly turned into forceful torrents. Two baby sitters giggled as they hurried across the street with their charges in strollers and just missed being splashed by a tractor-trailer. People waiting at a bus stop held newspapers over their heads, but the rain shower made such protection ineffective.