Separating into groups for traveling

On the other side of the door...

"What are we going to do now?" A newbie asked the group of veterans. He doesn't know what to do in a place like this.

"You just need to get to the city alive. There will be some people there who will give the instructions to you. The city is about ten kilometers away, but it is a pity that not all of you will survive. Good luck" After speaking those words. A large proportion of the veterans ran towards the city. They already know each other, so it is better to form several groups among them. Besides, they don't want to waste time with newbies.