RULE#1
fly
flies
bus
buses
leaf
leaves
radio
radios
sheep
sheep
party
parties
box
boxes
wolf
wolves
potato
potatoes
fish
fish
day
days
dish
dishes
knife
knives
hero
heroes
mouse
mice
country
countries
lunch
lunches
elf
elves
kangaroo
kangaroos
child
children
key
keys
watch
watches
scarf
scarves
zoo
zoos
person
people