$7\mathrm{.}7$ Many fighting games generate special moves by pressing buttons in a particular order

$($i$.$e$.,$ "combos"$).$ For example, $"$BA$"$ might generate a "grab and throw" and "BAAB"

might generate a "flying kick." How could you use an N$-$Gram to predict the player's

next button press? Why would using this approach to create opponent AI probably be

a waste of time? What applications might make sense?