You are Mr Lim and you are helping your friend Mr Wong deliver face masks to your neighbors to help combat the COVID-19 (Coronavirus Disease 2019). You deliver the last batch of masks and board the lift to go back to the ground floor.
Suddenly, the lift shakes violently and comes to an abrupt stop! The lights and ventilation fans go off. There is an eerie silence in the lift. You try to press the alarm button but nothing seems to work. You start getting a little worried because you know that without the ventilation fans, you only have a limited amount of oxygen to survive.
You try the alarm button again when suddenly a sinister voice speaks out, "TO ESCAPE FROM THIS LIFT, YOU WILL NEED TO COMPLETE MY PUZZLES. DO IT CORRECTLY AND YOU WILL LIVE..."