Some of the "codes" I just remember and if I forget, what I do is open up SMS in a new tab and hit Reply to a post. Then over on the right, under all the smiley pictures, it says More. I click on that, a pop-up window comes up and I expand that so I can see it and see what I need to type to get the smiley I want. I usually remember that

is : festive: (without the space, otherwise it would be the smiley) and

is : thumbsup: and

is : love:
You just type in whatever it has in the pop-up window to get the smiley you want. Hope that makes sense.
.