a blackboard	a book	a chair
a computer	a crayon	a desk
an eraser	a notebook	paper

a pen	a pencil	a pencil sharpener
a ruler	scissors	a blackboard
a book	a desk	a notebook

a blackboard	a desk	a pen
a pencil sharpener	a chair	an eraser
a notebook	scissors	a classroom

a notebook	a ruler	a chair
a pen	a book	an eraser
scissors	a pencil sharpener	a computer

an eraser	a chair	a book
a pencil	a pencil sharpener	a desk
a blackboard	paper	a notebook

a computer	a ruler	a desk
an eraser	scissors	a classroom
a chair	a pencil sharpener	a pen

paper	a pen	a classroom
a crayon	an eraser	a notebook
a ruler	a book	a computer

a classroom	a pencil	a chair
a pencil sharpener	paper	a crayon
a desk	a blackboard	an eraser

a chair	a computer	a crayon
a desk	a pencil	a book
a ruler	a pen	scissors

a notebook	a pencil	scissors
a crayon	a chair	a pen
paper	a blackboard	a computer

a ruler	a classroom	a book
paper	a blackboard	a pencil sharpener
a notebook	a crayon	a pencil

a ruler	a desk	a computer
a classroom	a pencil	scissors
a crayon	paper	a notebook

a notebook	a computer	paper
scissors	a pen	a ruler
an eraser	a blackboard	a crayon

a desk	a notebook	a pencil
a classroom	a computer	an eraser
a pencil sharpener	paper	a book

a chair	a pen	a ruler
a crayon	a blackboard	paper
an eraser	a book	a notebook

a book	a pencil	a computer
a classroom	paper	a crayon
a desk	a pen	a notebook