Fire brigade: Hurry, it's time to go!

Welcome to the fire department rescue team.

Alarm was triggered, there is a fire in a house. You quickly arrive at the scene. Your task is to save the house tenants who are jumping out of the windows that are engulfed in flames. There are four types of stretchers for the tenants from different floors at your disposal. Show how attentive and fast you are, and save all the tenants.