A: ㅁㅎ (뭐해)
What are you doing?
B: ㅍ (폰)
cell phone

A: ㅇ ㅈ? (안 자?)
Why aren't you sleeping yet?
B: ㅇ ㅈㄹ (안 졸려)
I'm not sleepy.
A: ㅇㄹ ㅈㄹ (얼른 자라)
Go to sleep.
B: ㅂㄱㅅㅇ (보고싶어)
I miss you
A: ㅗ (FU)
F### you