duck
ducks
spider
spiders
apple
apples
game
games
park
parks
monster
monsters
toy
toys
aircraft
aircraft
pants
pants
sheep
sheep
moose
moose
mango
mangoes
swine
swine
horse
horses
marker
markers
shrimp
shrimp
wheat
wheat
chair
chairs
table
tables
tuna
tuna
book
books
potato
potatoes
teacher
teachers
fish
fish