great_directors = ['Martin Scorsese','Steven Spielberg','Francis Ford Coppola']
great_directors[1] = 'Michael Bay'

transformers = ['Optimus Prime','Megatron','Bumblebee','Starscream']
transformers[2]='Grimlock'

tech_companies = ['Google','Microsoft','Blackberry','IBM','Yahoo']
tech_companies[1] = 'Facebook'
tech_companies[2] = 'Apple'

camping_trip_supplies = ['Socks','Flashlight','Tent','Blanket']
camping_trip_supplies[0] = 'Food'