Rule 123.6b

As a name sticker is placed on an object, that object’s controller chooses a position in that object’s name for the word in the name sticker to be added, then announces that object’s new name. That word can be added at the beginning of the object’s name or after any number of the other words that are currently in its name. The new name can be further modified by other name stickers. If that object has no name, its name becomes the word added by the name sticker. Name stickers never modify or remove any of the other words in that name. Example: As a player puts a name sticker with the word “Dark” printed on it onto a creature named Bear Cub, that creature’s controller chooses whether its new name is “Dark Bear Cub,” “Bear Dark Cub,” or “Bear Cub Dark.” They then announce the new name to all players.