add S
pencil
pencils
box
boxes
variety
varities
life
lives
valley
valleys
season
seasons
beach
beaches
enemy
enemies
shelf
shelves
country
countries
teacher
teachers
potato
potatoes
policy
policies
elf
elves
newspaper
newspapers
flower
flowers
hero
heroes
activity
activities
loaf
loaves
self
selves
friend
friends
princess
princesses
bully
bullies
leaf
leaves
thief
thieves