I do not want to be a computer science person any more. I want to be a hippie tree sitter. I bet hippie tree sitters do not have to try to make I=〈D, φ, π〉 mappings of things when you are trying to map four things to three things or else you've read the question wrong twice. I bet they just get to sit in trees and not shower. I know I can not shower and I bet I could figure out how to sit in trees.