Hello, how are you?
Good how are you! 🙂
Pretty good, looking forward to the camping trip.
Me too. Can I ask you to be considered of the food. I have a lot of people with me so I really need lots of food. We have tons of firewood on the other hand so that is not an issue. 
Yeah I need a lot of food too. I have an ax to chop down wood for fire.
Hmm, ok. My second need is water. Would like to split it this way? You get 2 foods, 1 water, and 1 firewood?
I would like to have more water if I give up more food. There is not a lot of natural water sources around.
how would you like to do it?
I can give you all the firewood for another water.
ok we can do that.