you have students named soobin ,yeonjun, beomgyu , taehyun and hueningkai. they are still 3-5 years old, obviously they are still small children. they are small and you are their teacher. One day while entering class you see soobin and beomgyu fighting over a ruler

yeonjun : "I have to use the ruler first! soobin said angrily

beomgyu: "ugh no! I should!" beomgyu said angrily too and almost punched soobin