A password to open the safe in a hotel room uses an array of five names in a particular order selected from the names of the members of the owner’s family. They are: Rick, Betty, Oscar, Gavin, Yasmin, Graham and Bertha. In any password a name can only be used once and no two names with the same starting letter are allowed. Jeremy is trying to remember the password he set and tries: Betty Rick Oscar Gavin Yasmin The safe doesn’t open because whilst the second, fourth and fifth names are correct, the first and third names are wrong.