Rule # 2
fox
foxes
berry
berries
key
keys
calf
calves
volcanoes
cross
crosses
party
parties
monkey
monkeys
half
halves
mosquito
mosquitoes
wish
wishes
pony
ponies
valley
valleys
thief
avocado
avocadoes
hutch
hutches
daisy
daisies
tray
trays
loaf
loaves
hero
heroes
quiz
quizzes
reply
replies
trolley
trolleys
hoof
hooves
buffalo
buffaloes