set<int> maker(){
    set<int> everything;


    for(auto it = master_map.begin(); it != master_map.end(); ++it){
        everything.insert(it->first);
        for (auto vit = it->second.first.begin(); vit != it->second.first.end(); vit++) { //
            everything.insert(*vit);
        }
        for (auto vit2 = it->second.second.begin(); vit2 != it->second.second.end(); vit2++) {
            everything.insert(*vit2);
        }
    }

    return everything;
}