I would like to order five sandwiches for the five members of my family: Greg, Tom, Susan, Mary and myself: I’m Rob. Three of sandwiches are turkey sandwiches, the other two are roast beef. Two of the sandwiches have mayonnaise. Mary’s sandwich does not have mayonnaise. Greg and Tom never order the same sandwich, unless Susan is also ordering it. Greg is allergic to mayonnaise, as is Tom, but not when it’s on turkey. Four of the sandwiches have pickles and onions, and the one that doesn’t belongs to Rob. Mary and Susan always order the same meat, but never the same condiment. In the bag, the turkey sandwiches are next to each other.