Two students are trying to combine their decks of Battleémon cards (a knock off version of another famous card game) so that they make one large deck of cards that contains exactly one of each unique type of Battleémon card that they own - in alphabetical order. In order to do this, the students start with two lists, deck1 and deck2, which are lists of all Battleémon cards each student owns (duplicates included) and the following available procedures.