燃やす
book
brain
business
businessman
caucasian
classroom
concept
difficulty
education
effort
fire
formula
fusion
glasses
hard
head
headache
history
hot
ironic
job
learn
man
merger
mind
occupation
office
pain
read
red
school
search
smoke
solution
student
study
table
teacher
think
tie
time
tired
tought
white
work
worker