Macro Question (Shadowrun4E)

Trying to make a macro for one of my players for his Commanding Voice adept power, basically like Command in DnD, except he can say up to five words. Using ?{Prompt Message}, is there any way to impose an in-macro limit of 5 words?

Only by using drop-downs, limiting the word selection. There's no truncating functions like in Excel. Someone could probably do something clever with a custom script, but that would require a Pro subscription. It seems like a lot of work when the player should be able to count to 5.... surely?

Other than the social solution of expecting the player to moderate and limit their own short sentence, you could massively over-engineer it by having 5 queries asking for a single word each time: /em issues a magically charged command: "?{Word 1} ?{Word 2} ?{Word 3} ?{Word 4} ?{Word 5}!" Obviously, nothing stops them from entering multiple words in any of the prompts but it might help?!?