ok.. not just a simple combo, but things that make combo a simple one
first, of all, you need a starter for the combo. i prefer S for a starter because it gives a lot of air time when your opponent is on the ground, but the drawback is that you can miss the third a or fourth a because your S put your enemy too far ahead.. so LETS WIPE THAT OPTION OUT UNLESS YOU PREFER TO DO S AA DASH A ...> which is more of a starter for long combos than a simple one. so.. do newbz, i would use "aas" as a starter; because it doesn't really require any skills of some sort o.o.
now, as for trying to continue combos, "aaaa" before crosscut is always good for beginners. but if you want more of a harder one, do "aaaa dash a"; but if you have enough airtime and in range for aaas, do that! because it gives more air time than aaaa dash a, and it will have more of a chance to continue the combo in the long run..
last newb thing you need to know: kicking and crosscut are the main skills to continuing the combo. i prefer kicking first, then s afterwards and then shift; but since you want a simple combo, i'll not talk about it
. so yeah, always do kicking then s when you are almost out of options. it gives a nice amount of air time to continue too.
so from the knowledge i have given you.. i'll make up a straight combo (no shifts)
a-a-s-a-a-a-a-kicking-crosscut (no cancel) windkick.
if you are within the range of aaas after aas: a-a-s-a-a-a-s-dash-a-kicking-s-crosscut-windkick.
shifts and halfdashes are important, so lets make a longer combo.
a-a-s-a-a-a-s-dash a-kicking- s-shift (45 degrees)-aaas (if you are within the range of it)-shift-a-a-a-s-shift-a-a-a-a crosscut-a-a-a-a-kicking-s-a-a-a-s-whirling sword
this can go on, but it requires much of an advanced skill
(not canceling). anyways.. i don't want to give too much effort into this post so yea.. i'll stop here.