a classroom	a blackboard	a book
a desk	a chair	an eraser
a computer	a pen	a pencil sharpener

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

a classroom	an eraser	a ruler
a notebook	a book	a computer
a pen	scissors	a pencil

a pen	paper	a book
a ruler	a blackboard	a computer
scissors	a notebook	a desk

a computer	a book	a blackboard
a crayon	a notebook	an eraser
a classroom	a pencil sharpener	a pen

a desk	paper	an eraser
a computer	scissors	a pencil
a book	a notebook	a ruler

a pencil sharpener	a ruler	a pencil
a chair	a computer	a pen
paper	a blackboard	a desk

a pencil	a crayon	a book
a notebook	a pencil sharpener	a chair
an eraser	a classroom	a computer

a book	a desk	a chair
an eraser	a crayon	a blackboard
paper	a ruler	scissors

a pen	a crayon	scissors
a chair	a book	a ruler
a pencil sharpener	a classroom	a desk

paper	a pencil	a blackboard
a pencil sharpener	a classroom	a notebook
a pen	a chair	a crayon

paper	an eraser	a desk
a pencil	a crayon	scissors
a chair	a pencil sharpener	a pen

a pen	a desk	a pencil sharpener
scissors	a ruler	paper
a computer	a classroom	a chair

an eraser	a pen	a crayon
a pencil	a desk	a computer
a notebook	a pencil sharpener	a blackboard

a book	a ruler	paper
a chair	a classroom	a pencil sharpener
a computer	a blackboard	a pen

a blackboard	a crayon	a desk
a pencil	a pencil sharpener	a chair
an eraser	a ruler	a pen