A team of little animals and a team of big animals decided to play football. During the first half of the game, the big animals were winning. But during the second half,a centipede scored so many touchdowns that the little animals won the game. When the game was over, the chipmunk asked the centipede, "Where were you during the first half?" He replied "Putting on my shoes".
Three: one to write the light bulb removal program, one to write the light bulb insertion program, and one to act as a light bulb administrator to make sure nobody else tries to change the light bulb at the same time.